Alternate timeline

An alternate timeline was a reality that diverged from the "true" timeline due to the actions of time travellers or other temporal phenomena. They were different from parallel universes in that they did not separate cleanly at the point of creation resulting in the new timeline destroying the old one. (PROSE: Imperial Moon) The phenomenon may also have been described as an "interstitial spillage of time." (AUDIO: Project: Lazarus)

Physics
Alternate timelines could be visited accidentally by jumping a time track (TV: The Space Museum, AUDIO: The Mutant Phase) or contacting other anomalies (AUDIO: Colditz) in the Time Vortex. Deliberate travel to these timelines was possible if the traveller possessed something, such as the sigil ring, that allowed them to change time streams. (PROSE: Goth Opera)

They may have diverged from points in history when there was temporal fluctuation. The power required to adjust the timeflow and overcome temporal inertia on such a scale couldn't fit on a single planet, but beings with enough power were capable of doing so, such as Sutekh, the Guardians of Time, Rassilon, and the Chronovores. Even the Doctor or the Master could have the know-how or inclination to create them. Because the universe only had a finite amount of mass and energy to exist as one universe, the creation of an alternate timeline adversely affected the real timeline, causing chaos throughout the universe; releasing enough energy could destroy the timeline and set history back on its correct course. (PROSE: Blood Heat)

Though a timeline could be negated, memories of it could still be retained. (TV: The Big Bang, The Impossible Astronaut) Sometimes these memories were subconscious and only surfaced in dreams. (AUDIO: The Time of the Daleks, Jubilee) Multiple timelines could co-exist in one continuum; because of this, an individual with multiple futures could come in contact without any Blinovitch Limitation Effects. (AUDIO: Peri and the Piscon Paradox)

Occasionally, time was actually changed so that what was originally the future became an alternate timeline. These were not meant to replace the true timeline but were the result of changes to the real timeline including, apparently, WOTAN conquering Earth (TV: The Time Travellers) and the Doctor dying on Grace Alone (AUDIO: The First Wave) and later Trenzalore. (TV: The Name of the Doctor, The Time of the Doctor) This may have related to causality, with knowledge coming before an event rather than an event becoming knowledge. The Doctor encountered WOTAN after it'd conquered Earth in 1966, changing history when he later arrived in 1966; the opposite would be the Doctor arriving in an 1804 where the French Revolution was still happening, as he already knew this was incorrect. (PROSE: The Man in the Velvet Mask)

Two Earth Reptile temporal scientists theorised that after changes were made to history, it took twenty minutes for the new timeline to become established. (PROSE: The Crystal Bucephalus)

Metaphysics
From a metaphysical viewpoint, alternate timelines constantly winked in and out of existence with every decision made, (AUDIO: The Wrong Doctors) always being extinguished as fewer and fewer choices became open. This was particularly affected by time travellers who changed the future whenever they arrived in a new time. This was the cosmic pain of the universe and in this manner Gabriel and Tanith were personifications of the timelines that never existed. (PROSE: Falls the Shadow)

The existence/creation of alternate timelines and parallel universes was held in check by the existence of the Time Vortex, which was sustained by the existence of the Time Lords who created it. (PROSE: The Domino Effect)

Terminology
The phrase "alternate/alternative timeline/universe/reality" was sometimes used interchangably with "parallel universe"; however, alternate timelines usually changed after a single moment in time, whereas parallel universes usually had more than one difference from the "normal" universe.

Timelines encountered by the Doctor
{|
 * Timeline || Negated By || Featured in
 * The First Doctor and his companions became exhibits in the Moroks' Space Museum||First Doctor, Ian Chesterton, Barbara Wright, and Vicki||TV: The Space Museum
 * Barbara Wright married Ptolemy I and became Queen of Alexandria||Alternate Barbara||PROSE: The Book of Shadows
 * The First Doctor, Steven Taylor, and Oliver Harper died on Grace Alone||Oliver Harper||AUDIO: The First Wave
 * 1794 Earth became the World Machine, with the French Revolution continuing until 1804||The Pageant after being confronted by the First Doctor||PROSE: The Man in the Velvet Mask
 * WOTAN conquered Earth (this was the correct timeline before it was changed by the Doctor)||First Doctor||PROSE: The Time Travellers, TV: The War Machines
 * Mechanistria was taken over by machines||possibly negated by Drako, though he might not have succeeded||PROSE: Peril in Mechanistria
 * Nancy Grover used Grold technology to become a goddess||Third Doctor and Liz Shaw||PROSE: The Eye of the Giant
 * The Power Elite took over Earth||Third Doctor||PROSE: Prisoners of the Sun
 * Freedom fighters from the 22nd century assassinated Sir Reginald Styles, causing a war which enabled the Daleks to invade Earth||Third Doctor and Jo Grant||TV: Day of the Daleks
 * Theodore Cassells's experiments led to a global war which devastated Earth||Third Doctor||COMIC: A Stitch in Time
 * The Third Doctor died on Dust and regenerated||Eighth Doctor by destroying Gallifrey (PROSE: The Ancestor Cell)||PROSE: Interference - Book One, Interference - Book Two
 * Sutekh was freed in 1911 and devastated Earth||Fourth Doctor and Sarah Jane Smith||TV: Pyramids of Mars
 * In the year 4000, Jalnik uses a crack in time to pull the Pantophagen out of the time Vortex, Earth is devastated by them.||Fourth Doctor||AUDIO: The Foe from the Future
 * Daleks underwent the Mutant Phase||Dalek Emperor||AUDIO: The Mutant Phase
 * John Smith and the Common Men were the most successful band in the world instead of the Beatles||Fifth Doctor and Nyssa||AUDIO: 1963: Fanfare for the Common Men
 * Melanicus created the Millennium Wars||Fifth Doctor, Sir Justin, and Shayde||COMIC: The Tides of Time
 * The 22nd century Dalek invasion didn't take place||Fifth Doctor and Nyssa||AUDIO: Renaissance of the Daleks
 * Earth in 2008 was controlled by smoke creatures||Fifth Doctor, Nyssa, and Thomas Brewster||AUDIO: The Haunting of Thomas Brewster
 * Adric created a city of intelligent scorpions||Fifth Doctor and Nyssa||AUDIO: The Boy That Time Forgot
 * Phil and Trev created a perfect world||Fifth Doctor, Nyssa, and Thomas Brewster||AUDIO: A Perfect World
 * Stockbridge had an Eternal Summer||Fifth Doctor, Nyssa, and Maxwell Edison||AUDIO: The Eternal Summer
 * Walter Raleigh went back in time and encountered aliens||Sixth Doctor||AUDIO: Voyage to the New World
 * The Doctor's arrival on the planet Bixor to investigate the cause of its destruction turned out to be the actual cause of its destruction||Sixth Doctor||AUDIO: The Wings of a Butterfly
 * The Herd-Leader of the Bovine travelled back in time to warn himself he shouldn't help Columbus discover America||Perpugilliam Brown and Christopher Columbus||AUDIO: Trouble in Paradise
 * Cyberverse||Possibly negated when Evelyn Smythe left the Sixth Doctor||WC: Real Time/AUDIO: Real Time
 * Daleks invaded Earth in 1903 and were defeated by the British Empire||the last surviving Dalek||AUDIO: Jubilee
 * Wolfgang Amadeus Mozart became immortal||Sixth Doctor and Evelyn Smythe||AUDIO: My Own Private Wolfgang
 * President Bailey allowed the Slithergee race to settle on the first moon of the planet Puxatornee in the year 3060, which allowed the Slithergee to take complete control of the planet in the year 3090||Seventh Doctor, Mel, Stuart, and Reed||AUDIO: Flip-Flop
 * The assassination of President Bailey caused the next President, Mitchell, to declare war on the Slithergee race in the year 3060, the result of which left the planet Puxatornee devastated by the year 3090||Seventh Doctor, Mel, Lieutenant Stuart, and Lieutenant Reed||AUDIO: Flip-Flop
 * Alternate timeline (The Ripple Effect)||Seventh Doctor||PROSE: The Ripple Effect
 * Humans evolved into Haemovores||Seventh Doctor and Ace||TV: The Curse of Fenric
 * The Dark Matrix terrorised England||Seventh Doctor and Ace||PROSE: Matrix
 * The Nazis won World War II after a piece of laser technology was left at Colditz Castle||Alternate Eighth Doctor and Elizabeth Klein (inadvertently)||AUDIO: Colditz, Klein's Story
 * Vladimir Kryuchkov succeeded Konstantin Chernenko as leader of the Soviet Union, causing World War III to occur in 1989||Seventh Doctor||AUDIO: Protect and Survive
 * Adolf Hitler used the Timewyrm's power to enable Nazi Germany to conquer Earth||Seventh Doctor and Ace||PROSE: Timewyrm: Exodus
 * Chad Boyle killed Dorothy McShane with a brick to the head||Ace||PROSE: Timewyrm: Revelation
 * The Process came into being and enslaved the Time Scaphe crew||Seventh Doctor and Vael||PROSE: Cat's Cradle: Time's Crucible
 * Silurian Earth||Destroyed, not negated, by Seventh Doctor||PROSE: Blood Heat
 * The Garvond never came into being||Artemis the Chronovore||PROSE: The Dimension Riders
 * Huitzilin died without becoming a psychevore||Artemis the Chronovore||PROSE: The Left-Handed Hummingbird
 * The Land of Fiction remained inactive||Artemis the Chronovore||PROSE: Conundrum
 * Brigadier Lethbridge-Stewart was shot and killed by a Vardan in 1976||Artemis the Chronovore||PROSE: No Future
 * Alternate timeline (Time & Time Again)||Seventh Doctor, Ace, and Bernice Summerfield||COMIC: Time & Time Again
 * The Knights of Velyshaa conquered Gallifrey||Fifth Doctor, Sixth Doctor, Seventh Doctor, and the Temperon||AUDIO: The Sirens of Time
 * Elizabeth Klein created the Galactic Reich after stealing the Doctor's TARDIS and making repeated corrections to the timeline||Seventh Doctor, Elizabeth Klein, and the Selachians (the last two inadvertently, after being manipulated by the Doctor)||AUDIO: The Architects of History
 * Earth was destroyed by the Eye of Harmony||Eighth Doctor and Grace Holloway||TV: Doctor Who
 * Sato Katsura formed the Church of the Glorious Dead which conquered Earth||Kroton||COMIC: The Glorious Dead
 * Humans didn't evolve and Earth was a Tractis colony known as Paratractis||Eighth Doctor, Sam Jones, and Jo Grant||PROSE: Genocide
 * Edward Grove came to life||Eighth Doctor and Charley Pollard||AUDIO: The Chimes of Midnight
 * Sebastian Grayle became immortal and helped the Nimon conquer Earth||Eighth Doctor and Charley Pollard||AUDIO: Seasons of Fear
 * Shakespeare vanished from history||Eighth Doctor and Charley Pollard||AUDIO: Invaders from Mars, AUDIO: The Time of the Daleks
 * Daleks invaded Earth in the 17th century||Eighth Doctor and Charley Pollard||AUDIO: The Time of the Daleks
 * The Master used a conceptual bomb made from Bob Dovie's refusal to accept the existence of the Doctor's TARDIS to erase said TARDIS, thus meaning the Doctor never left Gallifrey||First Doctor, Second Doctor, Third Doctor, Fourth Doctor, Fifth Doctor, Sixth Doctor, Seventh Doctor, and Eighth Doctor||AUDIO: The Light at the End
 * Morbius returned and defeated the Time Lords||Eighth Doctor, Time Lords||AUDIO: Vengeance of Morbius
 * Straxus became Kotris and saved the Dalek Time Controller||Dalek Time Controller||AUDIO: Dark Eyes
 * Pete Tyler didn't die and Reapers began consuming humanity||Pete Tyler||TV: Father's Day
 * Giovanni Lucio helped Massimo conquer the Roman Empire||Tenth Doctor and Rose Tyler||COMIC: The Futurists
 * The Year That Never Was||Tenth Doctor, Martha Jones, and Captain Jack Harkness ||TV: Last of the Time Lords
 * Donna's World||alternate Donna Noble, with assistance from Rose Tyler||TV: Turn Left
 * The Progenitor Daleks repopulated Skaro and exterminated humanity to extinction in 1963||Eleventh Doctor and Amy Pond||GAME: City of the Daleks
 * The Kin gained control of Earth meaning humanity was extinct in 2010||Eleventh Doctor||PROSE: Nothing O'Clock
 * Vincent Van Gogh paints the Krafayis into one of his works||Eleventh Doctor and Amy Pond||TV: Vincent and the Doctor
 * The Doctor's TARDIS exploded, creating Cracks in Time which began erasing the universe's history||Eleventh Doctor, Amy Pond, Rory Williams (Auton), and River Song (TV: The Big Bang)||TV: Series 5
 * Ship kidnapped people and wiped Foxtown off the map|| Eleventh Doctor|| PROSE: The Way Through the Woods
 * Amy Pond was stranded on Apalapucia for 36 years||Eleventh Doctor and Rory Williams||TV: The Girl Who Waited
 * River Song's World||Eleventh Doctor, Amy Pond, Rory Williams, River Song, and the Teselecta||TV: The Wedding of River Song
 * The Silurians attempted to pump poison onto Earth's surface to reclaim it||Eleventh Doctor and River Song||GAME: The Eternity Clock
 * The Progenitor Daleks invaded and destroyed London in or before 2106||Eleventh Doctor and River Song||GAME: The Eternity Clock
 * Amy Pond was killed by Jack the Ripper||Eleventh Doctor||COMIC: Ripper's Curse
 * The Cybermen conquered the galaxy||Eleventh Doctor and Jean-Luc Picard||COMIC: Assimilation²
 * Rory Williams remained imprisoned in Winter Quay for the rest of his life||Rory Williams and Amy Pond||TV: The Angels Take Manhattan
 * The Creevix erased the existence of Guy Taylor, allowing them to use his time machine to enter the universe on 23 November 2013 and consume it||First Doctor, Susan Foreman, Second Doctor, Jamie McCrimmon, Zoe Heriot, Third Doctor, Mike Yates, Fourth Doctor, Romana II, Fifth Doctor, Adric, Nyssa, Tegan Jovanka, Sixth Doctor, Peri Brown, Seventh Doctor, Ace, Eighth Doctor, Charley Pollard, Ninth Doctor, Rose Tyler, Jack Harkness, Tenth Doctor, Donna Noble, Eleventh Doctor, Alice Watson, and Cedric Chivers|| AUDIO: The Time Machine
 * The TARDIS was damaged by van Baalen Bros. and self-destructed||Eleventh Doctor||TV: Journey to the Centre of the TARDIS
 * The Great Intelligence negated the Doctor's victories||Clara Oswald||TV: The Name of the Doctor
 * The Doctor died on Trenzalore and the planet became a battlefield graveyard||Clara Oswald, the Time Lords and the Eleventh Doctor||TV: ''[[The Time of the Doctor]|}
 * Silurian Earth||Destroyed, not negated, by Seventh Doctor||PROSE: Blood Heat
 * The Garvond never came into being||Artemis the Chronovore||PROSE: The Dimension Riders
 * Huitzilin died without becoming a psychevore||Artemis the Chronovore||PROSE: The Left-Handed Hummingbird
 * The Land of Fiction remained inactive||Artemis the Chronovore||PROSE: Conundrum
 * Brigadier Lethbridge-Stewart was shot and killed by a Vardan in 1976||Artemis the Chronovore||PROSE: No Future
 * Alternate timeline (Time & Time Again)||Seventh Doctor, Ace, and Bernice Summerfield||COMIC: Time & Time Again
 * The Knights of Velyshaa conquered Gallifrey||Fifth Doctor, Sixth Doctor, Seventh Doctor, and the Temperon||AUDIO: The Sirens of Time
 * Elizabeth Klein created the Galactic Reich after stealing the Doctor's TARDIS and making repeated corrections to the timeline||Seventh Doctor, Elizabeth Klein, and the Selachians (the last two inadvertently, after being manipulated by the Doctor)||AUDIO: The Architects of History
 * Earth was destroyed by the Eye of Harmony||Eighth Doctor and Grace Holloway||TV: Doctor Who
 * Sato Katsura formed the Church of the Glorious Dead which conquered Earth||Kroton||COMIC: The Glorious Dead
 * Humans didn't evolve and Earth was a Tractis colony known as Paratractis||Eighth Doctor, Sam Jones, and Jo Grant||PROSE: Genocide
 * Edward Grove came to life||Eighth Doctor and Charley Pollard||AUDIO: The Chimes of Midnight
 * Sebastian Grayle became immortal and helped the Nimon conquer Earth||Eighth Doctor and Charley Pollard||AUDIO: Seasons of Fear
 * Shakespeare vanished from history||Eighth Doctor and Charley Pollard||AUDIO: Invaders from Mars, AUDIO: The Time of the Daleks
 * Daleks invaded Earth in the 17th century||Eighth Doctor and Charley Pollard||AUDIO: The Time of the Daleks
 * The Master used a conceptual bomb made from Bob Dovie's refusal to accept the existence of the Doctor's TARDIS to erase said TARDIS, thus meaning the Doctor never left Gallifrey||First Doctor, Second Doctor, Third Doctor, Fourth Doctor, Fifth Doctor, Sixth Doctor, Seventh Doctor, and Eighth Doctor||AUDIO: The Light at the End
 * Morbius returned and defeated the Time Lords||Eighth Doctor, Time Lords||AUDIO: Vengeance of Morbius
 * Straxus became Kotris and saved the Dalek Time Controller||Dalek Time Controller||AUDIO: Dark Eyes
 * Pete Tyler didn't die and Reapers began consuming humanity||Pete Tyler||TV: Father's Day
 * Giovanni Lucio helped Massimo conquer the Roman Empire||Tenth Doctor and Rose Tyler||COMIC: The Futurists
 * The Year That Never Was||Tenth Doctor, Martha Jones, and Captain Jack Harkness ||TV: Last of the Time Lords
 * Donna's World||alternate Donna Noble, with assistance from Rose Tyler||TV: Turn Left
 * The Progenitor Daleks repopulated Skaro and exterminated humanity to extinction in 1963||Eleventh Doctor and Amy Pond||GAME: City of the Daleks
 * The Kin gained control of Earth meaning humanity was extinct in 2010||Eleventh Doctor||PROSE: Nothing O'Clock
 * Vincent Van Gogh paints the Krafayis into one of his works||Eleventh Doctor and Amy Pond||TV: Vincent and the Doctor
 * The Doctor's TARDIS exploded, creating Cracks in Time which began erasing the universe's history||Eleventh Doctor, Amy Pond, Rory Williams (Auton), and River Song (TV: The Big Bang)||TV: Series 5
 * Ship kidnapped people and wiped Foxtown off the map|| Eleventh Doctor|| PROSE: The Way Through the Woods
 * Amy Pond was stranded on Apalapucia for 36 years||Eleventh Doctor and Rory Williams||TV: The Girl Who Waited
 * River Song's World||Eleventh Doctor, Amy Pond, Rory Williams, River Song, and the Teselecta||TV: The Wedding of River Song
 * The Silurians attempted to pump poison onto Earth's surface to reclaim it||Eleventh Doctor and River Song||GAME: The Eternity Clock
 * The Progenitor Daleks invaded and destroyed London in or before 2106||Eleventh Doctor and River Song||GAME: The Eternity Clock
 * Amy Pond was killed by Jack the Ripper||Eleventh Doctor||COMIC: Ripper's Curse
 * The Cybermen conquered the galaxy||Eleventh Doctor and Jean-Luc Picard||COMIC: Assimilation²
 * Rory Williams remained imprisoned in Winter Quay for the rest of his life||Rory Williams and Amy Pond||TV: The Angels Take Manhattan
 * The Creevix erased the existence of Guy Taylor, allowing them to use his time machine to enter the universe on 23 November 2013 and consume it||First Doctor, Susan Foreman, Second Doctor, Jamie McCrimmon, Zoe Heriot, Third Doctor, Mike Yates, Fourth Doctor, Romana II, Fifth Doctor, Adric, Nyssa, Tegan Jovanka, Sixth Doctor, Peri Brown, Seventh Doctor, Ace, Eighth Doctor, Charley Pollard, Ninth Doctor, Rose Tyler, Jack Harkness, Tenth Doctor, Donna Noble, Eleventh Doctor, Alice Watson, and Cedric Chivers|| AUDIO: The Time Machine
 * The TARDIS was damaged by van Baalen Bros. and self-destructed||Eleventh Doctor||TV: Journey to the Centre of the TARDIS
 * The Great Intelligence negated the Doctor's victories||Clara Oswald||TV: The Name of the Doctor
 * The Doctor died on Trenzalore and the planet became a battlefield graveyard||Clara Oswald, the Time Lords and the Eleventh Doctor||TV: ''[[The Time of the Doctor]|}
 * Giovanni Lucio helped Massimo conquer the Roman Empire||Tenth Doctor and Rose Tyler||COMIC: The Futurists
 * The Year That Never Was||Tenth Doctor, Martha Jones, and Captain Jack Harkness ||TV: Last of the Time Lords
 * Donna's World||alternate Donna Noble, with assistance from Rose Tyler||TV: Turn Left
 * The Progenitor Daleks repopulated Skaro and exterminated humanity to extinction in 1963||Eleventh Doctor and Amy Pond||GAME: City of the Daleks
 * The Kin gained control of Earth meaning humanity was extinct in 2010||Eleventh Doctor||PROSE: Nothing O'Clock
 * Vincent Van Gogh paints the Krafayis into one of his works||Eleventh Doctor and Amy Pond||TV: Vincent and the Doctor
 * The Doctor's TARDIS exploded, creating Cracks in Time which began erasing the universe's history||Eleventh Doctor, Amy Pond, Rory Williams (Auton), and River Song (TV: The Big Bang)||TV: Series 5
 * Ship kidnapped people and wiped Foxtown off the map|| Eleventh Doctor|| PROSE: The Way Through the Woods
 * Amy Pond was stranded on Apalapucia for 36 years||Eleventh Doctor and Rory Williams||TV: The Girl Who Waited
 * River Song's World||Eleventh Doctor, Amy Pond, Rory Williams, River Song, and the Teselecta||TV: The Wedding of River Song
 * The Silurians attempted to pump poison onto Earth's surface to reclaim it||Eleventh Doctor and River Song||GAME: The Eternity Clock
 * The Progenitor Daleks invaded and destroyed London in or before 2106||Eleventh Doctor and River Song||GAME: The Eternity Clock
 * Amy Pond was killed by Jack the Ripper||Eleventh Doctor||COMIC: Ripper's Curse
 * The Cybermen conquered the galaxy||Eleventh Doctor and Jean-Luc Picard||COMIC: Assimilation²
 * Rory Williams remained imprisoned in Winter Quay for the rest of his life||Rory Williams and Amy Pond||TV: The Angels Take Manhattan
 * The Creevix erased the existence of Guy Taylor, allowing them to use his time machine to enter the universe on 23 November 2013 and consume it||First Doctor, Susan Foreman, Second Doctor, Jamie McCrimmon, Zoe Heriot, Third Doctor, Mike Yates, Fourth Doctor, Romana II, Fifth Doctor, Adric, Nyssa, Tegan Jovanka, Sixth Doctor, Peri Brown, Seventh Doctor, Ace, Eighth Doctor, Charley Pollard, Ninth Doctor, Rose Tyler, Jack Harkness, Tenth Doctor, Donna Noble, Eleventh Doctor, Alice Watson, and Cedric Chivers|| AUDIO: The Time Machine
 * The TARDIS was damaged by van Baalen Bros. and self-destructed||Eleventh Doctor||TV: Journey to the Centre of the TARDIS
 * The Great Intelligence negated the Doctor's victories||Clara Oswald||TV: The Name of the Doctor
 * The Doctor died on Trenzalore and the planet became a battlefield graveyard||Clara Oswald, the Time Lords and the Eleventh Doctor||TV: ''[[The Time of the Doctor]|}
 * The Silurians attempted to pump poison onto Earth's surface to reclaim it||Eleventh Doctor and River Song||GAME: The Eternity Clock
 * The Progenitor Daleks invaded and destroyed London in or before 2106||Eleventh Doctor and River Song||GAME: The Eternity Clock
 * Amy Pond was killed by Jack the Ripper||Eleventh Doctor||COMIC: Ripper's Curse
 * The Cybermen conquered the galaxy||Eleventh Doctor and Jean-Luc Picard||COMIC: Assimilation²
 * Rory Williams remained imprisoned in Winter Quay for the rest of his life||Rory Williams and Amy Pond||TV: The Angels Take Manhattan
 * The Creevix erased the existence of Guy Taylor, allowing them to use his time machine to enter the universe on 23 November 2013 and consume it||First Doctor, Susan Foreman, Second Doctor, Jamie McCrimmon, Zoe Heriot, Third Doctor, Mike Yates, Fourth Doctor, Romana II, Fifth Doctor, Adric, Nyssa, Tegan Jovanka, Sixth Doctor, Peri Brown, Seventh Doctor, Ace, Eighth Doctor, Charley Pollard, Ninth Doctor, Rose Tyler, Jack Harkness, Tenth Doctor, Donna Noble, Eleventh Doctor, Alice Watson, and Cedric Chivers|| AUDIO: The Time Machine
 * The TARDIS was damaged by van Baalen Bros. and self-destructed||Eleventh Doctor||TV: Journey to the Centre of the TARDIS
 * The Great Intelligence negated the Doctor's victories||Clara Oswald||TV: The Name of the Doctor
 * The Doctor died on Trenzalore and the planet became a battlefield graveyard||Clara Oswald, the Time Lords and the Eleventh Doctor||TV: ''[[The Time of the Doctor]|}
 * Rory Williams remained imprisoned in Winter Quay for the rest of his life||Rory Williams and Amy Pond||TV: The Angels Take Manhattan
 * The Creevix erased the existence of Guy Taylor, allowing them to use his time machine to enter the universe on 23 November 2013 and consume it||First Doctor, Susan Foreman, Second Doctor, Jamie McCrimmon, Zoe Heriot, Third Doctor, Mike Yates, Fourth Doctor, Romana II, Fifth Doctor, Adric, Nyssa, Tegan Jovanka, Sixth Doctor, Peri Brown, Seventh Doctor, Ace, Eighth Doctor, Charley Pollard, Ninth Doctor, Rose Tyler, Jack Harkness, Tenth Doctor, Donna Noble, Eleventh Doctor, Alice Watson, and Cedric Chivers|| AUDIO: The Time Machine
 * The TARDIS was damaged by van Baalen Bros. and self-destructed||Eleventh Doctor||TV: Journey to the Centre of the TARDIS
 * The Great Intelligence negated the Doctor's victories||Clara Oswald||TV: The Name of the Doctor
 * The Doctor died on Trenzalore and the planet became a battlefield graveyard||Clara Oswald, the Time Lords and the Eleventh Doctor||TV: ''[[The Time of the Doctor]|}
 * The Great Intelligence negated the Doctor's victories||Clara Oswald||TV: The Name of the Doctor
 * The Doctor died on Trenzalore and the planet became a battlefield graveyard||Clara Oswald, the Time Lords and the Eleventh Doctor||TV: ''[[The Time of the Doctor]|}
 * The Doctor died on Trenzalore and the planet became a battlefield graveyard||Clara Oswald, the Time Lords and the Eleventh Doctor||TV: ''[[The Time of the Doctor]|}
 * The Doctor died on Trenzalore and the planet became a battlefield graveyard||Clara Oswald, the Time Lords and the Eleventh Doctor||TV: ''[[The Time of the Doctor]|}

Timelines encountered by others
{| e}} [[Category:Temporal theory|}
 * Timeline || Negated By || Featured in
 * Peri Brown was not assassinated and lived with King Yrcanos as a Warrior Queen||Not negated but existing due to a Time Lord faction||AUDIO: Peri and the Piscon Paradox
 * Peri Brown did not live with Yrcanos and was returned to Earth with her memories of the Doctor erased save for her first adventure with him||Not negated but existing due to a Time Lord faction||AUDIO: Peri and the Piscon Paradox
 * Peri Brown's future was altered another three times||Not negated but existing due to a Time Lord faction||AUDIO: Peri and the Piscon Paradox
 * The Seventh Doctor defeated the Vardan invasion of Earth by leaving clues for his past self||The Monk||PROSE: No Future
 * Insects of the Mind evolved as the dominant life on Earth||The existence of time travel||PROSE: Falls the Shadow
 * Britain was a conformist republic||The existence of time travel||PROSE: Falls the Shadow
 * Andrea Yates' World||alternate Andrea Yates||TV: Whatever Happened to Sarah Jane?
 * The Trickster's World||Eddie and Barbara Smith||TV: The Temptation of Sarah Jane Smith
 * Ship erased Sarah Jane Smith, Luke Smith and Clyde Langer||Adam Lloyd and Rani Chandra||TV: The Mad Woman in the Attic
 * Ben and Katy die in a fire||Sarah Jane Smith and Emily Morris||TV: Lost in Time
 * Deindum from the future conquered the galaxy||Bernice Summerfield||PROSE: Present Danger, AUDIO: ''[[Escaping the Future]|}
 * Britain was a conformist republic||The existence of time travel||PROSE: Falls the Shadow
 * Andrea Yates' World||alternate Andrea Yates||TV: Whatever Happened to Sarah Jane?
 * The Trickster's World||Eddie and Barbara Smith||TV: The Temptation of Sarah Jane Smith
 * Ship erased Sarah Jane Smith, Luke Smith and Clyde Langer||Adam Lloyd and Rani Chandra||TV: The Mad Woman in the Attic
 * Ben and Katy die in a fire||Sarah Jane Smith and Emily Morris||TV: Lost in Time
 * Deindum from the future conquered the galaxy||Bernice Summerfield||PROSE: Present Danger, AUDIO: ''[[Escaping the Future]|}
 * Ship erased Sarah Jane Smith, Luke Smith and Clyde Langer||Adam Lloyd and Rani Chandra||TV: The Mad Woman in the Attic
 * Ben and Katy die in a fire||Sarah Jane Smith and Emily Morris||TV: Lost in Time
 * Deindum from the future conquered the galaxy||Bernice Summerfield||PROSE: Present Danger, AUDIO: ''[[Escaping the Future]|}
 * Deindum from the future conquered the galaxy||Bernice Summerfield||PROSE: Present Danger, AUDIO: ''[[Escaping the Future]|}
 * Deindum from the future conquered the galaxy||Bernice Summerfield||PROSE: Present Danger, AUDIO: ''[[Escaping the Future]|}