Theory:Timeline - Fourth Doctor

This page lists appearances of the Fourth Doctor in the order in which he experienced them. This timeline is based on observations of the Doctor Who universe and the events in each of these stories. From these observations we have attempted to build a concise timeline. It is assumed, much like their TV story counterparts, that each novel or audio series their published/numbered order is the order they occur in. There are also many gaps between stories.

The layout of this timeline is based in part on the observations on Doctor Who Reference Guide and Doctor Who - The Complete Adventures, Lance Parkin's AHistory and other sources that allow us to make observations, such as DocOhoReviews, Doc Oho's Book Reviews, The History of the Doctor, The Discontinuity Guide, Clive Banks Databank, Whopix, the Big Finish forums and The Divergent Universe forums. None of these sources should be used solely as a source or considered a "true" timeline for stories.

Companions
Due to the nature of travel throughout season 12, any story featuring TARDIS travel with Harry Sullivan (other than TV: The Ark in Space) must take place after TV: Revenge of the Cybermen and before TV: Terror of the Zygons. Any story with Sarah Jane Smith must take place before TV: The Hand of Fear. Any story with Leela must take place after TV: The Face of Evil and before TV: The Invasion of Time. Any story with K9 Mark I must take place after TV: The Invisible Enemy and before TV: The Invasion of Time. Any story with K9 Mark II must take place after TV: The Invasion of Time and before TV: Warriors' Gate. Any story with Romana I must take place after TV: The Ribos Operation and before TV: Destiny of the Daleks. Any story with Romana II must take place after TV: Destiny of the Daleks and before TV: Warriors' Gate. Any story with Adric must be set after TV: Full Circle.

Costume
The Fourth Doctor has an advantage when dating his stories due to his costume. The Doctor started out with a small red coat, a rainbow scarf, and blue jeans. His coat soon grew to a larger deep brown coat. Eventually, his costume turned into the "red" version. This makes dating very simple when looking at how the Doctor is dressed.

A new body

 * TV: Planet of the Spiders
 * The Doctor regenerates from his previous incarnation inside his UNIT laboratory with the aid of K'anpo Rimpoche.


 * TV: Robot
 * Set immediately after Planet of the Spiders, with the Doctor's regeneration stabilising. Though he intends a fresh start by leaving UNIT behind, he accepts Sarah's offer to let her travel with him. UNIT doctor Harry Sullivan follows them into the TARDIS.


 * PROSE: Doctor Who and the Face of Evil
 * Sneaking away from UNIT during the events of Robot, the Doctor visits the Mordee colony, and attempts to repair Xoanon.

The Nerva Beacon

 * TV: The Ark in Space
 * Harry is taking his first trip in the TARDIS, setting this directly after Robot. The TARDIS crew arrive at the Nerva Beacon due to Harry fiddling with TARDIS, and volunteer to beam down to Earth to do repairs, leading directly into The Sontaran Experiment.


 * TV: The Sontaran Experiment
 * The TARDIS crew fix the faulty equipment on Earth and beam back to the Nerva Beacon.


 * TV: Genesis of the Daleks
 * Set immediately after The Sontaran Experiment. The Time Lords intercept to transmat beam and give the Doctor a Time Ring and a mission on Skaro, where the Doctor meets Davros and witnesses the creation of the Daleks.


 * PROSE: A Device of Death
 * The Doctor, Sarah and Harry are scattered across the Adelphine Cluster due to temporal disruption interfering with the Time Ring, setting this immediately after Genesis of the Daleks. The Doctor claims to be 748-years-old.


 * PROSE: The Last Thing You Ever See
 * The Doctor, Sarah and Harry are still using the Time Ring, setting this shortly after Genesis of the Daleks.


 * TV: Revenge of the Cybermen
 * Just as they retrieve the TARDIS from the Nerva Beacon, the TARDIS crew receive a summons from the Brigadier, leading into Terror of the Zygons.

Returning to UNIT

 * PROSE: Nanomorphosis
 * The TARDIS still needs time to recover from the solar flare radiation from Revenge of the Cybermen.


 * AUDIO: #HarrySullivan
 * The Doctor is attempting to travel to Scotland, but the TARDIS is knocked off course and arrives on the Zephyr instead.


 * COMIC: Black Destiny
 * The Doctor and his companions expect to find the Loch Ness on exiting the TARDIS, setting this shortly before Terror of the Zygons.


 * PROSE: Wolfsbane
 * The Doctor, Sarah and Harry are wearing their costumes from Terror of the Zygons. The TARDIS is knocked off course after an attempt to get to Scotland. After returning Godric to the arthurian times, the TARDIS makes its way to Scotland, leading into Terror of the Zygons.


 * PROSE: Toil and Trouble
 * Harry claims that this is only his second trip in the TARDIS. Ending leads directly into Terror of the Zygons.


 * TV: Terror of the Zygons
 * The TARDIS crew make it to Scotland, and Harry decides to remain on Earth with UNIT.


 * TV: Planet of Evil
 * Set immediately after Terror of the Zygons, with the TARDIS having just left Loch Ness for London.


 * PROSE: The Republican's Story
 * The Doctor claims to have travelled over 30,000 years to get to the 17th century, implying that this takes place immediately after Planet of Evil. The Doctor is blamed for the Great Fire of London, setting this before Pyramids of Mars.


 * PROSE: Rights
 * Sarah and the Doctor are still wearing the clothes they wore in Planet of Evil.


 * TV: Pyramids of Mars
 * The Doctor and Sarah are still trying to get back to London.


 * PROSE: Scarab of Death
 * Set immediately after Pyramids of Mars.


 * PROSE: Old Flames
 * The Doctor is wearing a burgundy coat, and Sarah observes that he has been moody as of late, setting this shortly after Pyramids of Mars.


 * TV: The Android Invasion
 * The Doctor and Sarah make it to London after leaving for it in Terror of the Zygons, and enduring side-tracks during Planet of Evil and Pyramids of Mars.

Association with UNIT

 * The Doctor and Sarah Jane return to UNIT HQ, and base themselves on Earth, with the Doctor staying at a cottage and resuming use of Bessie, (COMIC: Death Flower, Return of the Daleks) while Sarah Jane continues working as an investigative reporter. (COMIC: The Hoaxers) However, they frequently take side trips, and are often accompanied by Harry. (PROSE: A New Life, The Hospitality on Hankus)


 * COMIC: Death Flower
 * The Doctor and Sarah Jane both comment on getting used to the Doctor's new face.


 * COMIC: Return of the Daleks
 * The TARDIS is captured by a Renegade Time Lord called Shazar, however, with the Time Lords' help, the Doctor is able to retrieve his ship.


 * While working with UNIT, the Doctor does research into Richard III for his book, Doctor Who Discovers Historical Mysteries. (AUDIO: The Kingmaker)


 * PROSE: A New Life (1976)
 * The Doctor and Sarah leave UNIT HQ to take a trip in the TARDIS. The Brigadier is not happy and questions Harry on their whereabouts.


 * PROSE: Managra
 * Though the book's blurb places this between Planet of Evil and Pyramids of Mars, the Doctor and Sarah aren't trying to get to London.


 * COMIC: Gaze of the Medusa
 * The Doctor and Sarah have faced Sutekh, and the TARDIS has its primary interior, setting this between Pyramids of Mars and The Masque of Mandragora. The Doctor claims the Brigadier will be angry if he returns without Sarah, and Sarah is excited to see the look on Harry's face when they tell him they met his great-grandparents.


 * PROSE: The Lost Generation
 * Sarah recalls the events of The Android Invasion.


 * COMIC: The Wreckers


 * COMIC: The Emperor's Spy


 * PROSE: Scratchman
 * The Doctor alludes to the recent events of Terror of the Zygons and The Android Invasion.


 * PROSE: The Hospitality on Hankus


 * COMIC: The Psychic Jungle


 * PROSE: The Sinister Sponge


 * COMIC: The Sinister Sea


 * COMIC: Woden's Warriors


 * COMIC: Neuronic Nightmare


 * PROSE: Avast There!


 * PROSE: The Mission


 * COMIC: The Space Ghost


 * PROSE: War on Aquatica


 * PROSE: Cyclone Terror


 * PROSE: The Time Snatch


 * COMIC: The Body Snatcher


 * PROSE: The Eye-Spiders of Pergross


 * PROSE: Detour to Diamedes


 * PROSE: Double Trouble


 * COMIC: Menace on Metalupiter


 * PROSE: Secret of the Bald Planet


 * PROSE: The Heat-Seekers


 * PROSE: To Kill a Nandi Bear


 * PROSE: The Last Broadcast


 * PROSE: The Terror of the Darkness
 * The Doctor and Harry's cameo takes place immediately after The Last Broadcast.


 * PROSE: The Dragons of Prague


 * AUDIO: How to Win Planets and Influence People


 * PROSE: The Vampires of Crellium


 * PROSE: On the Slippery Trail


 * COMIC: The Dalek Revenge
 * The Time Lords take control of Bessie, and send the Doctor on a mission to defeat the Daleks on the planet Ercos.


 * COMIC: Virus
 * The Time Lords direct the TARDIS to a synthetic jungle inside a space station.


 * COMIC: Treasure Trail
 * The Time Lords direct the TARDIS to a vineyard in Italy so that the Doctor can save some art treasures.


 * TV: The Brain of Morbius
 * The Doctor complains about the Time Lords "messing about with the TARDIS", setting this after the comic stories set between Return of the Daleks and Treasure Trail, where the Time Lord had been doing so.


 * PROSE: Evolution
 * Sarah refers to the recent events of The Brain of Morbius.


 * PROSE: Sarah Jane and the Temple of Eyes
 * Set shortly after The Brain of Morbius.


 * COMIC: Hubert's Folly
 * Set a few days after Treasure Trail.


 * PROSE: All Done with Mirrors


 * PROSE: The Duke of Dominoes


 * PROSE: Observer Effect
 * Sarah understands that it takes time for radio waves to travel between Mars and Earth, setting this after Pyramids of Mars.


 * COMIC: Counter-Rotation


 * COMIC: Mind Snatch


 * COMIC: The Hoaxers


 * PROSE: Conscription
 * Sarah claims it is Christmas in her time period.


 * PROSE: UNIT Christmas Parties: Ships That Pass


 * PROSE: Blessed Are the Peacemakers


 * AUDIO: Chain Reaction


 * COMIC: The Tansbury Experiment


 * COMIC: The Mutant Strain


 * COMIC: Double Trouble


 * COMIC: Dredger


 * AUDIO: The Wondrous Box


 * AUDIO: Collector's Item


 * TV: The Seeds of Doom


 * PROSE: The Magic Box


 * PROSE: Which Way Out?


 * PROSE: System Shock
 * Set between The Seeds of Doom and The Masque of Mandragora.It has been one month from her perspective since Sarah Jane has seen Harry.

Final adventures with Sarah

 * AUDIO: Doctor Who and the Pescatons
 * Set between The Seeds of Doom and The Masque of Mandragora.


 * PROSE: The Sleeping Beast


 * PROSE: The Sands of Tymus


 * COMIC: The Rival Robots


 * PROSE: A New Life (1978)


 * COMIC: The Traitor


 * PROSE: The Sea of Faces


 * PROSE: Categorical Imperative
 * The Doctor and Sarah go back in time to save the Eighth Doctor after he fails to kill a dictator as a baby.


 * PROSE: Dr. Fourth


 * TV: The Masque of Mandragora
 * The Doctor begins using the secondary control room in the TARDIS.


 * COMIC: Jackals of Space
 * The Doctor is using the secondary control room, setting this after The Masque of Mandragora.


 * PROSE: The Android Maker of Calderon IV
 * Sarah recalls the events of The Masque of Mandragora.


 * PROSE: Eternity
 * The Doctor is using the secondary control room, setting this after The Masque of Mandragora.


 * PROSE: Autaia Pipipi Pia


 * PROSE: Hello Goodbye
 * The Doctor is using the secondary control room, setting this after The Masque of Mandragora.


 * COMIC: Where's the Doctor?
 * The Doctor and Sarah attend the coronation of Elizabeth II.


 * AUDIO: Exploration Earth: The Time Machine


 * COMIC: The Naked Flame
 * Sarah is wearing her Andy Pandy clothes, setting this shortly before The Hand of Fear.


 * TV: The Hand of Fear
 * Sarah decides she had had enough of life in the TARDIS, and the Doctor receives a summons from Gallifrey, forcing him to leave Sarah behind. Ending leads directly into The Deadly Assassin.

Companionless

 * TV: The Deadly Assassin
 * The Doctor crosses wits with on Gallifrey.


 * PROSE: Ghost Ship
 * The Doctor broods over the lives lost on Gallifrey during The Deadly Assassin.


 * PROSE: Farewells
 * The Doctor visits Sarah Jane Smith to give her a proper farewell.


 * PROSE: Ode to Joy
 * The Doctor is travelling alone, and still feels melancholy because "she" is no longer with him.


 * PROSE: The Death Pit / The Drosten's Curse
 * The Doctor mentions recently traveling through a virtual jungle, as he did in  The Deadly Assassin, and the TARDIS's secondary control room is being used.


 * COMIC: Day of the Tune


 * PROSE: Only Connect


 * PROSE: Callahuanca


 * PROSE: The Feast of Seven... Eight (and Nine)


 * AUDIO: Someone I Once Knew
 * Set a few weeks after The Deadly Assassin in an alternate timeline.


 * COMIC: The False Planet


 * COMIC: The Fire Feeders


 * COMIC: Kling Dynasty


 * PROSE: Dr. Who and the Hell Planet


 * GAME: Destiny of the Doctors
 * The Doctor is traveling alone in his bohemian attire. Images of Davros, Morbius, and are in his mind, setting this at least after The Deadly Assassin.


 * COMIC: Assimilation²

Old friends

 * COMIC: The Sky Warrior


 * PROSE: The Stranger, The Writer, His Wife and the Mixed Metaphor


 * PROSE: Master of the Blackhole
 * The Doctor is using the secondary console room.


 * PROSE: Hamlet's Soliloquy
 * The Doctor has helped Shakespeare write Hamlet, setting this after The Stranger, The Writer, His Wife and the Mixed Metaphor.


 * COMIC: Under Pressure


 * PROSE: Down to Earth


 * PROSE: UNITed We Fall


 * PROSE: Mutiny


 * PROSE: Wonderland


 * PROSE: Millennium Shock
 * Set between The Deadly Assassin and The Face of Evil.

Milena and Ms. Young

 * COMIC: The Sea Devil
 * The Doctor is being assisted by Miss Young while he takes Bessie to investigate a meteorite crash in Scotland.


 * PROSE: Milena
 * As a favour to the ruler of Xenon, the Doctor takes Milena for a trip in the TARDIS.

New acquaintances

 * PROSE: Asylum
 * The Doctor meets Nyssa for the first time, but she is already well acquainted with him due to a future encounter.


 * PROSE: The Northern Heights


 * PROSE: The Baron Wastes


 * PROSE: Earth


 * PROSE: My Hero


 * PROSE: In Case of Emergencies


 * PROSE: The Nobility of Faith


 * PROSE: The Doctor's Cross Word

Traveling with a savage

 * TV: The Face of Evil
 * Following her banishment from the Sevateem tribe, Leela forces her way into the TARDIS, joining the Doctor in his travels.


 * PROSE: Last Man Running
 * Though the book's blurb places this after The Robots of Death, Leela believes the TARDIS is possessed and the Doctor is highly irritated by her presence, setting this immediately after The Face of Evil.


 * PROSE: Psi-ence Fiction
 * Leela visits Earth for the first time, although her experience there is erased from the timeline.


 * AUDIO: The Helm of Awe
 * Leela has not heard of the Brigadier, setting this before The Revisionists.


 * TV: The Robots of Death
 * The Doctor explains transdimensional engineering to Leela, and is happy to have her in his company. He claims to be 750-years-old.


 * AUDIO: The Revisionists
 * Leela feels that she has been travelling with the Doctor for a few days, and has not had much fresh air due to travelling "between boxes" since she left her tribe. She yearns to be outdoors again. She mentions the Storm Mine 4, setting this after The Robots of Death.


 * AUDIO: Dumb Waiter
 * The Doctor uses a Time Ring to send Leela back into his second incarnation's TARDIS. Leela's eyes are brown and she refers to the Doctor as "the Evil One" out of habit, setting this shortly after The Face of Evil.


 * COMIC: The Orb
 * The secondary console room is still in use, setting this before The Invisible Enemy. Leela has only recently joined the Doctor, and fears she will be abandoned after angering him.


 * PROSE: Drift
 * The events of The Robots of Death are still fresh in Leela's mind.


 * PROSE: Corpse Marker
 * Though Leela is depicted dressed in her second attire, the book's cover places this between Last Man Running and The Talons of Weng-Chiang.


 * PROSE: Match of the Day


 * PROSE: It's a Lovely Day Tomorrow
 * Leela still shows particularly violent tendencies, setting this early in her travels.


 * PROSE: The Bushranger's Story
 * Leela has never seen a horse before, setting this before The Talons of Weng-Chiang.


 * PROSE: The Prodigal Sun


 * AUDIO: The Ghost Trap
 * Leela has only been traveling with the Doctor for a few weeks, but has seen spaceships.


 * AUDIO: Black Dog
 * Leela is still new to traveling in the TARDIS, but has come to see the Doctor as part of her "tribe".


 * TV: The Talons of Weng-Chiang
 * Battling Magnus Greel in 1889 London, the Doctor and Leela are aided by Henry Gordon Jago and Professor George Litefoot.


 * AUDIO: Destination: Nerva
 * The Doctor and Leela have just parted ways with Jago and Litefoot, setting this immediately after The Talons of Weng-Chiang.


 * AUDIO: The Renaissance Man
 * Leela refers to the events of The Talons of Weng-Chiang.


 * AUDIO: The Wrath of the Iceni


 * PROSE: Eye of Heaven
 * Leela has recently encountered horses, setting this shortly after The Talons of Weng-Chiang.


 * AUDIO: Energy of the Daleks
 * Leela has not been to London since The Talons of Weng-Chiang.


 * AUDIO: Trail of the White Worm
 * Ending leads directly into The Oseidon Adventure.


 * AUDIO: The Oseidon Adventure
 * The Doctor and the Master meet for the first time since The Deadly Assassin.


 * PROSE: The Brain of Socrates
 * Leela recalls the Victorian theatre from The Talons of Weng-Chiang.


 * PROSE: Red Planet
 * In her travels with the Doctor, Leela has seen "false gods", metropolitan cities, and "Old Earth", but does not know about Christmas.


 * AUDIO: Sound the Siren And I'll Come To You Comrade


 * COMIC: Rest and Re-Creation


 * AUDIO: Night of the Stormcrow


 * AUDIO: The Light at the End
 * The Doctor is currently using the secondary console room, setting this before it was disused in The Invincible Enemy. He indicates that he has had a recent encounter with the Master. Leela does not know about regeneration.


 * PROSE: Famine on Planet X


 * PROSE: The Planet of Dust


 * PROSE: Terror on Tantalogus


 * COMIC: The Power


 * PROSE: Flashback


 * COMIC: Emsone's Castle


 * PROSE: The Crocodiles from the Mist


 * AUDIO: The Ghosts of Gralstead
 * The Doctor and Leela discuss their previous visit to London from The Talons of Weng-Chiang. Leela has a limited ability to read English.


 * AUDIO: The Devil's Armada
 * Leela is still wearing Victorian clothing from The Ghosts of Gralstead.


 * AUDIO: The Genesis Chamber


 * AUDIO: The Catalyst
 * Leela is still learning basic reading. She still does not know about regeneration.


 * AUDIO: Empathy Games
 * The TARDIS' secondary console room is damaged by the fire started in The Catalyst. Leela is unfamiliar with the concept of money.


 * PROSE: Shamans


 * PROSE: The Sooner the Better


 * AUDIO: The Smallest Battle
 * Leela is still learning from the Doctor, setting this early in her adventures with him.


 * PROSE: The Living Wax


 * PROSE: Stanley
 * Leela views jeans as ridiculous, setting this before Horror of Fang Rock.


 * AUDIO: Death-Dealer
 * The Doctor teaches Leela about money for the first time, setting this after Empathy Games.


 * AUDIO: String Theory


 * AUDIO: The King of Sontar


 * AUDIO: White Ghosts
 * Leela is able to read on her own.


 * AUDIO: The Crooked Man


 * AUDIO: The Evil One
 * Leela recalls her previous encounter with the Master in The Oseidon Adventure.


 * AUDIO: Last of the Colophon


 * AUDIO: Destroy the Infinite


 * AUDIO: The Abandoned


 * AUDIO: Zygon Hunt


 * AUDIO: The Foe from the Future
 * Leela's reading level has advanced to the point where the Doctor is having her read him the works of Shakespeare. She also knows about policemen, setting this after The Talons of Weng-Chiang.


 * PROSE: The Destroyers


 * PROSE: The Very Last Picture Show
 * Leela still has brown eyes, setting this before Horror of Fang Rock.


 * WC: Prequel - The Legacy of Time
 * The Doctor is using the secondary control room. He hears the Sixth Doctor's voice through the temporal distortion and decides to make an emergency landing after spilling his Ginger beer on the TARDIS console.


 * The Doctor arrives on Hellan with Leela after making an emergency landing. (AUDIO: Collision Course)


 * COMIC: The Mutants
 * The secondary console room is still in use, setting this before The Invisible Enemy.


 * TV: Horror of Fang Rock
 * Due to pigment dispersal from witnessing an explosion, Leela's eye colour changes from brown to blue. She also wears jeans for the first time.


 * COMIC: The Devil's Mouth
 * Leela is wearing clothing similar to her clothes from Horror of Fang Rock.


 * COMIC: The Aqua-City
 * Leela is wearing trousers, setting this after Horror of Fang Rock.


 * In 18th century Japan, the Doctor and Leela fight Inek of the Orimsei as he tries to use a dimensional gateway to escape, at the risk of the Japanese population. (AUDIO: Time in Office)


 * PROSE: Dear Great Uncle Peter
 * Leela is wearing jeans, setting this shortly after Horror of Fang Rock.


 * AUDIO: The Child


 * AUDIO: The Valley of Death
 * Leela refers to the events of Horror of Fang Rock.


 * PROSE: The Changeling Years


 * PROSE: One Bad Apple

Adopting K9

 * TV: The Invisible Enemy
 * The Doctor closes the secondary console room for redecoration, and he takes Leela to the main console room for the first time as he moves back in to it. Leela is still learning to write her name. K9 is adopted by the Doctor on Professor Marius's insistence.


 * PROSE: Crimson Dawn
 * K9 takes damage from the drain on his batteries, as well as water damage from the canals, which gives him "corroded circuitry", leading into Image of the Fendahl.


 * TV: Image of the Fendahl
 * Leela has changed into a new set of clothes, and K-9 is suffering from "corroded circuitry".


 * The Doctor attempts to destroy the Fendahl by firing it into the Canthares supernova. (AUDIO: The Dalek Trap)


 * PROSE: Hamlet
 * The Doctor is hunting a second Fendahl skull, setting this shortly after Image of the Fendahl.


 * PROSE: People of the Trees
 * Leela recalls being temporarily blinded during Horror of Fang Rock.


 * PROSE: Christmas Every Day


 * PROSE: The Dogs of War
 * The Doctor and K9 begin playing chess, leading into The Sun Makers.


 * TV: The Sun Makers
 * Leela has changed back into her first outfit.


 * PROSE: The Roots of Evil
 * Leela remembers seeing the steel hives of the Sun Makers during The Sun Makers.


 * AUDIO: The Exxilons


 * AUDIO: The Darkness of Glass


 * AUDIO: Requiem for the Rocket Men


 * AUDIO: Death Match
 * Set immediately after Requiem for the Rocket Men.


 * AUDIO: Suburban Hell


 * AUDIO: The Cloisters of Terror


 * AUDIO: The Fate of Krelos
 * Ending leads directly into Return to Telos.


 * AUDIO: Return to Telos


 * COMIC: A Rare Gem
 * Leela and K9 are kidnapped by Adam Mitchell, leading directly into Endgame.


 * COMIC: Endgame
 * The Doctor joins with his other incarnations to rescue Leela and K9 from Adam and, and assists the other Doctors in saving their companions as well.


 * TV: Underworld
 * Leela is once again wearing her second outfit.


 * AUDIO: The Sons of Kaldor
 * Leela is dressed in her second outfit with her hair down, setting this, and the rest of the seventh audio series, between Underworld and The Invasion of Time.


 * AUDIO: The Crowmarsh Experiment


 * AUDIO: The Mind Runners
 * Ending leads directly into The Demon Rises.


 * AUDIO: The Demon Rises


 * AUDIO: The Shadow of London


 * AUDIO: The Bad Penny


 * AUDIO: Kill the Doctor!
 * Ending leads directly into The Age of Sutekh.


 * AUDIO: The Age of Sutekh


 * AUDIO: The Time Vampire
 * The Doctor is gathering the parts needed to build K9 Mark II.


 * TV: The Invasion of Time
 * After the Doctor uses his position as Lord President to propel an invasion of Gallifrey, Leela decides to stay on Gallifrey to marry Andred, and K9 elects to stay with her. Alone in the TARDIS, the Doctor decides to begin work on K9 Mark II.


 * TV: The Name of the Doctor
 * Set during The Invasion of Time, when the Doctor is moving around the Capitol.


 * PROSE: Timewyrm: Genesys
 * The Doctor makes a message about the Timewyrm as a warning for himself using information he learnt from the Matrix during The Invasion of Time.

After the Presidency

 * These stories are set shortly after The Invasion of Time, with the Doctor having just left Leela and K9 Mark I on Gallifrey, but not having yet opened the K9 Mark II container.


 * AUDIO: Night of the Vashta Nerada
 * The Doctor says that his previous companion has just departed for "pastures new", the implication being that he is referring to Leela staying on Gallifrey.


 * PROSE: Those Left Behind
 * The Doctor is still building K9 Mark II and stores him in a box on the TARDIS console room floor.


 * AUDIO: I Am The Master

Exploits with Ann Kelso

 * AUDIO: The Sinestran Kill
 * The Doctor meets WPC Ann Kelso and she joins him as his companion. K9 MK II has yet to be built, with his parts in a box on the TARDIS console room floor.


 * AUDIO: Planet of the Drashigs
 * Set immediately after The Sinestran Kill. The Doctor fully assembles and activates K9 MK II, and Ann takes her first trip to an alien planet.


 * AUDIO: The Enchantress of Numbers
 * K9 is still recharging after the recent events of Planet of the Drashigs.


 * AUDIO: The False Guardian


 * AUDIO: Time’s Assassin
 * Follows on directly from The False Guardian.


 * AUDIO: Fever Island
 * The Doctor and Ann have just ejected the Chronon Wave Front from the TARDIS and are pushed back in time, setting this immediately after Time's Assassin.


 * AUDIO: The Perfect Prisoners
 * Following the revelation that Ann is in fact a Time Agent called Anya Kingdom, the Doctor and K9 part ways with her.

Nest Cottage

 * AUDIO: The Stuff of Nightmares
 * The Doctor tells Mike Yates of the recent events of The Robots of Death, The Talons of Weng-Chiang, and Image of the Fendahl.


 * AUDIO: The Dead Shoes


 * AUDIO: The Circus of Doom


 * AUDIO: A Sting in the Tale


 * AUDIO: Hive of Horror
 * The Doctor leaves Nest Cottage. He alludes to having K9 in the TARDIS.

A return to wandering

 * COMIC: The Snow Devils


 * COMIC: The Space Garden


 * COMIC: The Eerie Manor


 * COMIC: Guardian of the Tomb


 * COMIC: The Image Makers


 * PROSE: Attachments


 * PROSE: Plight of the Monkrah


 * PROSE: Puppeteer


 * TV: The Day of the Doctor
 * The Doctor helps in the saving of Gallifrey on the last day of the Last Great Time War, and, in the novelisation, has a tea party with his other incarnations in the Under-Gallery as a celebration. He is using the main console control room.


 * PROSE: Machine Time


 * PROSE: The Glass Princess


 * PROSE: The Lost Diaries of Winston Spencer Churchill


 * COMIC: The Swords of Kali
 * A photograph depicts the Doctor in his "post-Underworld" appearance. No mention is made by Tiger of him travelling with another companion.

Seeking the serpent's egg

 * AUDIO: The Relics of Time
 * The Doctor returns to Nest Cottage after a year of traveling. Despite the events of The Wrath of the Iceni, the Doctor claims not to have visited the 1st century since his last regeneration, setting this before The Doctor's Cross Word.


 * AUDIO: The Demon of Paris


 * AUDIO: A Shard of Ice


 * AUDIO: Starfall


 * AUDIO: Sepulchre


 * AUDIO: Tsar Wars
 * Follows on directly from Sepulchre.


 * AUDIO: The Broken Crown


 * AUDIO: Aladdin Time
 * The Doctor leaves Nest Cottage once more.


 * AUDIO: The Hexford Invasion
 * The Doctor has spent much longer than nine months away from Nest Cottage.


 * The Doctor and Mrs Wibbsey go on many adventures on their way to saving Yates and all of Hexford. (AUDIO: Survivors in Space)


 * AUDIO: Survivors in Space
 * The Doctor departs from Nest Cottage again.

Lone travels with K9

 * PROSE: Timevault


 * PROSE: Time Shear


 * PROSE: The Doctor's Journal: Entry 2481/B-3


 * PROSE: Three Wise Men
 * The Doctor is illustrated as traveling with K9 in the TARDIS.


 * COMIC: Supremacy of the Cybermen Prologue: The Fourth Doctor
 * In an alternate timeline created by Rassilon and the Cybermen, K9 is cyber-converted during a Cyberman attack.

Looking for K9

 * COMIC: K-9's Finest Hour: Prologue
 * K9 is kidnapped, and the Doctor travels alone trying to find him.


 * COMIC: Doctor Who and the Iron Legion


 * COMIC: City of the Damned


 * PROSE: The Doctor's Journal: Entry 3512/A-7


 * AUDIO: The Winged Coven
 * The Doctor visits Nest Cottage and has Mrs. Fenella Wibbsey as a companion, setting this after Survivors in Space. He is wearing his brown coat.


 * COMIC: K-9's Finest Hour: Epilogue
 * The Doctor finds K9.

Quest for the Key to Time

 * TV: The Ribos Operation
 * The Doctor is given a quest by the White Guardian to assemble the Key to Time before the Black Guardian can, and is assigned Romana as an assistant. The Doctor claims to be 756-years-old, but Romana tells him he is really 759-years-old.


 * COMIC: The Seventh Segment
 * Romana is wearing her outfit from The Ribos Operation.


 * PROSE: Tomb of Valdemar
 * Set between The Ribos Operation and The Pirate Planet.


 * TV: The Pirate Planet
 * Set the morning after The Ribos Operation, with the Doctor sealing away the First Segment.


 * TV: The Stones of Blood
 * The Doctor takes Romana to Earth for the first time.


 * PROSE: The Shadow of Weng-Chiang
 * Romana refers to the events of The Stones of Blood.


 * PROSE: Prelude Falls the Shadow
 * The Doctor is taking a break from his quest.


 * PROSE: X-Rani and the Ugly Mutants
 * PROSE: Light Fantastic
 * COMIC: Terror on Xaboi
 * PROSE: Reluctant Warriors
 * COMIC: The Weapon
 * PROSE: Return of the Electrids
 * PROSE: The Sleeping Guardians
 * Throughout the Doctor Who Annual 1980, the Doctor is travelling with Romana I and K9, but is not trying to assemble the Key to Time, nor is he using the randomiser, setting these stories during the break from the quest that ended in Heart of TARDIS.


 * PROSE: Heart of TARDIS
 * The Doctor is forced to resume his quest for the Key to Time.


 * PROSE: Pericles


 * AUDIO: Ferril's Folly
 * The Doctor and Romana are searching for the Fourth Segment, setting this shortly before The Androids of Tara.


 * TV: The Androids of Tara


 * PROSE: The Glarn Strategy
 * The Doctor and Romana are looking for the Fifth Segment, setting this shortly before The Power of Kroll.


 * TV: The Power of Kroll


 * The Doctor and Romana investigated a mysterious painting. (AUDIO: Tales from the Vault)


 * AUDIO: Luna Romana
 * The Doctor and Romana are looking for the Sixth Segment, setting this shortly before The Armageddon Factor.


 * TV: The Armageddon Factor
 * The Doctor and Romana complete their quest to assemble the Key to Time, but the Doctor orders it to disperse itself to stop the Back Guardian claiming it. The Doctor installs a randomiser into the TARDIS to elude the vengeful Black Guardian.

Further adventures with Romana

 * AUDIO: The Auntie Matter
 * The Doctor and Romana are hiding from the Black Guardian in 1929 Hampshire, while K9 pilots the TARDIS around the universe to throw the Black Guardian off the Doctor's trail.


 * AUDIO: The Stealers from Saiph
 * The Doctor and Romana are taking a holiday in 1929 Antibes without K9, setting this during The Auntie Matter.


 * PROSE: Good Queen, Bad Queen, I Queen, You Queen
 * The Doctor has only recently installed the randomizer.


 * PROSE: Doing Time
 * The Doctor's companion is wearing "a neat designer dress straight from the pages of a magazine", a description matching the first incarnation of Romana.


 * AUDIO: The Sands of Life
 * Ending leads directly into War Against the Laan.


 * AUDIO: War Against the Laan
 * K9 is damaged after being affected by the time slippage.


 * AUDIO: The Justice of Jalxar
 * The Doctor gives his age as 760-years-old.


 * AUDIO: Phantoms of the Deep
 * Set one month after War Against the Laan, with K9 fully repaired from the damage caused by the time spillage.


 * AUDIO: The Dalek Contract
 * Romana encounters the Daleks for the first time. Ending leads directly into The Final Phase.


 * AUDIO: The Final Phase
 * Romana elects to continue travelling in the TARDIS instead of returning to Gallifrey.


 * PROSE: Life from Lifelessness
 * The Doctor arrived in Prague due to the randomiser, setting this after The Armageddon Factor.


 * COMIC: Death to the Doctor!


 * AUDIO: The Doctor's First XI


 * AUDIO: The Warren Legacy

The new Romana

 * TV: Destiny of the Daleks
 * Romana regenerates into a new body. The Doctor encounters Davros for the first time since Genesis of the Daleks.


 * COMIC: Victims
 * Romana is still wearing her outfit from Destiny of the Daleks.


 * PROSE: Under Reykjavik
 * Romana is still wearing her outfit from Destiny of the Daleks.


 * PROSE: All Snug in Their Beds
 * Romana's recent regeneration is referenced, setting this shortly after Destiny of the Daleks.


 * AUDIO: The Old Rogue
 * The Doctor plans to take Romana to Paris, leading into City of Death.


 * TV: City of Death
 * The Doctor and Romana fight Scaroth in 1979 Paris with the help of Duggan. The Doctor hasn't used his sonic screwdriver since Destiny of the Daleks.


 * PROSE: Special Occasions: 1. The Not-So-Sinister Sponge


 * PROSE: Special Occasions: 2. Do You Love Anyone Enough?


 * PROSE: Special Occasions: 3. Better Watch Out, Better Take Care
 * Romana has recently been to Paris, setting this shortly after City of Death.


 * PROSE: Special Occasions: 4. Playing with Toys
 * Set on the same day as The Not-So-Sinister Sponge, Do You Love Anyone Enough? and Better Watch Out, Better Take Care.


 * PROSE: The Dying Days
 * The Doctor, Romana and K-9 attend the Queen's re-coronation, and are spotted by the Brigadier.


 * PROSE: Beige Planet Mars
 * The Doctor, Romana and K-9 attend the Mars Conference, and have a run in with Bernice Summerfield.


 * COMIC: The Forgotten
 * Romana notes that she and the Doctor have been to Paris recently, setting this shortly after City of Death.


 * PROSE: The End of Now


 * PROSE: The Final Analysis


 * COMIC: The Lost Dimension
 * Romana encounters Ogrons with the Doctor for the first time, although she has already heard of them.


 * TV: The Creature from the Pit


 * PROSE: The Romance of Crime
 * Set between The Creature from the Pit and Nightmare of Eden.


 * PROSE: The English Way of Death
 * Set after The Romance of Crime.


 * AUDIO: Seven to One


 * TV: Nightmare of Eden


 * COMIC: Time & Time Again
 * Set during Nightmare of Eden.


 * AUDIO: The Beautiful People
 * The Doctor mentions recovering from the events of Nightmare of Eden.


 * AUDIO: The Pyralis Effect
 * Though the audio's blurb places this between Shada and The Leisure Hive, Romana does not yet have a sonic screwdriver, setting this before The Horns of Nimon.


 * PROSE: The Little Things
 * The Doctor acquires a chrono-historical stress gauge.


 * PROSE: The Clanging Chimes of Doom
 * The Doctor is still using the chrono-historical stress gauge from The Little Things.


 * PROSE: Present Tense
 * The Doctor's the chrono-historical stress gauge has been broken.


 * PROSE: Child's Play


 * TV: The Horns of Nimon
 * Romana reveals she has her own sonic screwdriver.


 * PROSE: Return of the Spiders


 * AUDIO: Babblesphere
 * The Doctor knows about Romana's sonic screwdriver, setting this after The Horns of Nimon.


 * AUDIO: Wave of Destruction
 * The Doctor and Romana are still worried about the Black Guardian's revenge, and Romana possess a sonic screwdriver, setting this after The Horns of Nimon.


 * AUDIO: The Labyrinth of Buda Castle


 * AUDIO: The Paradox Planet
 * Ending leads directly into Legacy of Death.


 * AUDIO: Legacy of Death


 * TV: Shada
 * The events of Shada are overwritten by The Five Doctors, and later experienced by the Eighth Doctor. Upon returning to the TARDIS, the Doctor decides to go to Brighton. In the novelisation, set without the interference of The Five Doctors, the Doctor claims to be 760-years-old.


 * PROSE: Glass
 * The Doctor and Romana encounter one of the escaped minds from Skagra's machine in 1976 Cambridge.


 * COMIC: The One
 * Wiping his own memory, the Doctor locks Shada away in a forgotten part of space.

After Shada

 * COMIC: Party Animals
 * The Doctor is trying to get to Brighton Pavillion.


 * AUDIO: Gallery of Ghouls
 * The Doctor is trying to get to Brighton, setting this shortly after Shada.


 * AUDIO: The Trouble with Drax
 * The Doctor is beginning to think that the Black Guardian has grown bored of revenge on him and Romana.


 * AUDIO: The Pursuit of History
 * Ending leads directly into Casualties of Time.


 * AUDIO: Casualties of Time


 * COMIC: Time Lady of Means
 * Romana has a sonic screwdriver, setting this after The Horns of Nimon.


 * PROSE: Doctor Who and the Krikkitmen
 * The Doctor recalls the events of Shada.


 * PROSE: Festival of Death
 * Set between Shada and The Leisure Hive.


 * PROSE: Checkpoint


 * The Doctor and Romana visit Hellan. (AUDIO: Collision Course)


 * PROSE: Colony of Death


 * PROSE: Alien Mind Games


 * PROSE: A Midsummer's Nightmare


 * COMIC: Every Dog Has His Day


 * PROSE: The Voton Terror


 * PROSE: Sweet Flower of Uthe


 * PROSE: Suitors, Inc.


 * PROSE: The Monster in the Wardrobe


 * PROSE: Breadcrumbs


 * PROSE: The Well-Mannered War
 * Menlove Stokes remembers the Doctor from The Romance of Crime. The Black Guardian tracks the Doctor and Romana down, but is defeated and entrapped in the Time Vortex by the Doctor, but the Doctor and Romana also get trapped in the vortex in the ordeal.

Lone adventures with K9

 * During the early Doctor Who Magazine issues, the Doctor is traveling with K9 Mark II without Romana, while wearing his bohemian clothing and having the randomiser activated. In Timeslip, he expresses a desire to contact Romana, suggesting that the two have been separated by forces beyond their control.


 * COMIC: Timeslip
 * The Movellans appear in the Doctor's vision, setting this after Destiny of the Daleks.


 * PROSE: The Fear


 * PROSE: The Two-Timer


 * PROSE: Stowaway

K9 and Sharon

 * COMIC: Doctor Who and the Star Beast
 * The Doctor refers to the Black Guardian, setting this after The Armageddon Factor. After capturing war criminal Beep the Meep, the Doctor offers Sharon Davies a trip home in the TARDIS. According to the the audio adaptation, in which K9 is absent, the Doctor is currently traveling with Romana.


 * COMIC: Doctor Who and the Dogs of Doom
 * Set immediately after Doctor Who and the Star Beast, with the Doctor failing to return Sharon home.


 * PROSE: Evil Egg


 * PROSE: Sands of Time


 * PROSE: Mind-Jump


 * PROSE: The Hole Truth


 * PROSE: Breakdown


 * COMIC: Doctor Who and the Time Witch
 * Sharon is forcibly aged four years by a malfunctioning chrono-compensator. The Doctor claims to be losing track of his true age.


 * COMIC: Dragon's Claw


 * COMIC: The Collector
 * The Doctor is able to return Sharon to Blackcastle, but she is uncertain if she wants to stay.


 * COMIC: Dreamers of Death
 * Sharon, feeling her aging has made it impossible to return home, leaves the TARDIS to stay with Vernon Allen on Unicepter IV.

More adventures with K9

 * COMIC: The Touchdown on Deneb-7


 * COMIC: The Life Bringer!
 * The Doctor has changed his clothes to a burgundy design, and the randomiser is still in effect.


 * COMIC: War of the Words


 * COMIC: Star Beast II

Final voyages with Romana

 * The Doctor and K9 somehow reunite with Romana, and she resumes traveling with them.


 * PROSE: Into the Silent Land
 * After switching his old clothes for a burgundy design, the Doctor decides to take Romana to Brighton.


 * PROSE: The Beast Inside
 * Romana is surprised that the Doctor now wears a burgundy coat, feeling it reflects a more morose and sombre mood.


 * PROSE: I Was a Monster!!!
 * The Doctor is wearing his burgundy costume.


 * PROSE: Insider Dealing
 * The Doctor is wearing his burgundy costume.


 * AUDIO: Luna Romana
 * The Doctor refers to the events of Doctor Who and the Iron Legion. The Doctor is wearing his burgundy costume.


 * AUDIO: The Beast of Kravenos
 * Authorial intent places this story, and most of the rest of the Season 6 audios, before The Leisure Hive, with the Doctor wearing his burgundy clothing, the Randomiser still effect and the Season 18 theme tune being used.


 * AUDIO: The Eternal Battle


 * AUDIO: The Silent Scream


 * AUDIO: Dethras
 * The Doctor is still trying to get to Brighton.


 * AUDIO: The Haunting of Malkin Place


 * AUDIO: Subterranea


 * AUDIO: The Movellan Grave


 * TV: The Leisure Hive
 * After a holiday in Brighton, the Doctor completely removes the randomiser to give it for the Tachyon Recreation Generator on Argolis. K9 is damaged after rolling into the sea without his sea water defences.


 * AUDIO: The Skin of the Sleek
 * K9 was recently damaged in Brighton, setting this shortly after The Leisure Hive. Ending leads directly into The Thief Who Stole Time.


 * AUDIO: The Thief Who Stole Time
 * K9 is still damaged.


 * TV: Meglos
 * Romana is still wearing her costume from Brighton and K9 is still in a damaged state. After repairing K9, the TARDIS is contacted by the Time Lords, who order Romana back to Gallifrey.

Trapped in E-Space

 * TV: Full Circle
 * En route to Gallifrey, the TARDIS gets sucked into E-Space, where Adric stows away on the TARDIS.


 * TV: State of Decay


 * PROSE: The Eight Doctors
 * Set during State of Decay.


 * PROSE: Pathfinders
 * Set immediately after State of Decay.


 * PROSE: O, Darkness
 * Adric has dealt with the Great Vampires, setting this after State of Decay.


 * AUDIO: The Invasion of E-Space


 * AUDIO: A Full Life
 * Adric mentions the imprisonments he endured during The Invasion of E-Space and O, Darkness. The Doctor and Romana die, but, after some years, Adric is able to change time so that the Doctor and Romana live.


 * TV: Warriors' Gate
 * As the Doctor and Adric escape E-Space, Romana elects to remain and help the enslaved Tharils release themselves from captivity, with K9 staying with her due to damage from the time winds preventing him from crossings back into N-Space.

Return to N-Space

 * PROSE: Planet of the Elves
 * Saddened by Romana's departure, the Doctor cleans the TARDIS.


 * TV: The Keeper of Traken
 * Having recently returned to N-Space, the Doctor and Adric are summoned to Traken by the Keeper of Traken to deal with a Melkur. With the aid of Consul Tremas and his daughter, Nyssa, the Doctor and Adric foil 's plan to steal the Source.


 * At some point, the Doctor assembles K9 Mark III, and K9 begins travelling with him and Adric. (PROSE: Inter-Galactic Cat)


 * PROSE: Inter-Galactic Cat
 * PROSE: Conundrum
 * PROSE: Planet of Paradise
 * COMIC: Plague World
 * PROSE: Just a Small Problem
 * During Doctor Who Annual 1982, K9 Mark III has been assembled, and the Doctor is wearing his bohemian attire while traveling with Adric, but is illustrated in his burgundy coat for Just a Small Problem.

Final adventures

 * The Doctor drops K9 Mark III off for Sarah Jane, (TV: A Girl's Best Friend) which saddens Adric (PROSE: A Boy's Tale) and seems to lead into a period of separation between the two.


 * AUDIO: The Thing from the Sea
 * The Doctor returns to Nest Cottage in his burgundy coat, and shares an adventure with Mrs. Fenella Wibbsey.


 * PROSE: Direct Action


 * COMIC: Spider-God


 * COMIC: The Deal


 * COMIC: End of the Line


 * COMIC: Doctor Who and the Free-Fall Warriors


 * COMIC: Junk-Yard Demon


 * COMIC: The Neutron Knights


 * COMIC: Junk-Yard Demon II
 * Sequel to Junkyard Demon.


 * AUDIO: Waiting for Gadot
 * The Doctor is travelling alone and wearing his burgundy coat.


 * AUDIO: Collision Course
 * The Doctor is recruited by Bernice Summerfield to help Romana to fly a TARDIS. He recognises both Leela and Romana, setting this after Warriors' Gate.


 * The Doctor reunites with Adric for more adventures.


 * PROSE: Mauritz


 * AUDIO: Erasure


 * TV: Logopolis
 * Accidently picking up Tegan Jovanka as a stowaway, the Doctor and Adric learn that has stolen Tremas's body. Informed of his coming regeneration by the Watcher, the Doctor is reunited with Nyssa on Logopolis, where the Master accidently starts the collapse of the universe. Forced to join forces to broadcast a CVE signal from Pharos Project, the Doctor is critically injured after he falls from the  antenna stopping the Master's betrayal, and is forced to regenerate into his next incarnation with the assistance of the Watcher.

Currently unplaced

 * These entries are placed here due to being part of an ongoing storyline that has yet to offer sufficient enough evidence to be placed in a specific part of this Doctor's timeline.

Awaiting placement

 * These entries are placed here until evidence presents itself that provides a clue as to where they happen in relation to other entries. Some of these are part of ongoing storylines that could present evidence towards the end of the plot.


 * AUDIO: The Power of the Daleks