A frock coat was a formal coat characterised by a knee-length skirt cut all around the base just above the knee, popular during the Victorian and Edwardian periods.
Worn by the Doctor[]
The First Doctor wore a double-breasted frock coat of plain black velvet with peaked lapels, most notably during his first adventure with Barbara Wright and Ian Chesterton during the Stone Age, (TV: The Unearthly Child) his alliance with Thals to defeat Skaro City Daleks in his first Dalek encounter on Skaro, (TV: The Daleks) during his encounter with Marco Polo and Kublai Khan on 1289, (TV: Marco Polo) during his first encounter with Voord, (TV: The Keys of Marinus) during his time with Aztecs, (TV: The Aztecs) during his first encounter with Sensorites, (TV: The Sensorites) during the French Revolution, (TV: The Reign of Terror) when confronting the Inventor Master on Destination, (AUDIO: The Destination Wars) when confronting Takagi Mamoru and Casper Knox in Japan during the 1820s, (AUDIO: The Barbarians and the Samurai) during his first encounter with a Dalek Supreme, (AUDIO: Return to Skaro) during the First Omega Crisis, (TV: The Three Doctors) when preventing Mark Forester's mad plan with DN6 from endangering life, (TV: Planet of Giants) when helping the Rebels of London foil Dalek Earthforce's Project Degravitate and saying goodbye to Susan Foreman, (TV: The Dalek Invasion of Earth), when meeting Vicki and foiling Bennett's plan to frame Didoans for his crimes, (TV: The Rescue) when accidentally inspiring Roman Emperor Nero to start the Great Fire of Rome on 64 AD, (TV: The Romans) when helping the Menoptera defy the Animus and Zarbi, (TV: The Web Planet) during the Crusades, (TV: The Crusade) when escaping the Morok Empire's Space Museum, (TV: The Space Museum) during his escape from Pursuer-Daleks as well as his first encounters with Mechonoids and Steven Taylor during the Mechonoid Incident, (TV: The Chase) during his first encounter with the Monk, (TV: The Time Meddler) during his first encounter with Drahvins and Rills, (TV: Galaxy 4) during his first encounter with Katarina and the Sacking of Troy, (TV: The Myth Makers) when foiling the Dalek Empire's master plan with the Time Destructor, (TV: The Dalek's Master Plan) during his first encounter with Sontarans, (AUDIO: The Sontarans) when braving the Game of Rassilon set up by President Borusa in his quest for immortality, (TV: The Five Doctors) when helping his future incarnations foil the Tremas Master and witnessing Adam Mitchell's fall, (COMIC: Endgame) during a trip to Paris during 1572, (TV: The Massacre) during his first adventure with Dodo Chaplet on the Ark as well as his first encounter with Monoids, (TV: The Ark) during his first game with the Toymaker, (TV: The Celestial Toymaker) when facing Pa Clanton and Johnny Ringo on 1881, (TV: The Gunfighters) during his first visit to the Der-Sen Monastery and his first encounter with Yeti, (AUDIO: The Secrets of Det-Sen) when meeting Captain Edal and saying goodbye to Steven, (TV: The Savages) during his confrontation with WOTAN and its War Machines as well as his farewell to Dodo, (TV: The War Machines) during his first adventure with Polly and Ben In the 17th century, (TV: The Smugglers) when helping his future incarnations to defeat a fleet of Mark VIII Daleks and save Gallifrey during the end of the Last Great Time War, (TV: The Day of the Doctor) and right up to his fall after the Mondasian Cyberman 1986 invasion of Earth. (TV: The Tenth Planet, Twice Upon A Time)
The Second Doctor wore an oversized black sack coat in place of a frock coat; most notably during the Vulcan Incident involving Mark III Daleks, (TV: The Power of the Daleks) during his first meeting with Jamie McCrimmon, (TV: The Highlanders) during a trip to Atlantis during 1970, (TV: The Underwater Menace) when foiling some Telosian Cybermen in their 2070 invasion of the Moonbase, (TV: The Moonbase) during his first encounter with Macra, (TV: The Macra Terror) when confronting the Inventor Master during World War 2, (AUDIO: The Home Guard) during his encounter with Chameleons as well as his farewell to Polly and Ben, (TV: The Faceless Ones) during his first encounter with Victoria and the Dalek Emperor's Operation Human Factor as well as the origin of the humanised Daleks, (TV: The Evil of the Daleks) during the Expedition to Telos and his first encounter with a Cyber Controller, (TV: The Tomb of the Cybermen) during his first encounter with Professor Edward Travers as well as the Great Intelligence and robotic Yeti, (TV: The Abominable Snowmen) when facing Warlord Varga during his first encounter with Ice Warriors, (TV: The Ice Warriors) when confronting Androgums Chessene and Shockeye as well as Group Marshal Stike and Major Varl of the Ninth Sontaran Battle Group, (TV: The Two Doctors) when helping his past and future incarnations foil the Tremas Master and witnessing Adam Mitchell's fall, (COMIC: Endgame) during his first encounter with Ramon Salamander, (TV: The Enemy of the World) during his reunion with Professor Travers as well as his first encounter with Colonel Alistair Lethbridge-Stewart and Anne Travers during a rematch with the Great Intelligence, (TV: The Web of Fear) during an encounter with a weed monster and his farewell to Victoria, (TV: Fury from the Deep) during his meeting with Zoe Heriot when foiling the Late Cyber-Faction's invasion of Space Station W3, (TV: The Wheel in Space) during his first encounter with Dominators and Quarks, (TV: The Dominators) during his first trip to the Land of Fiction, (TV: The Mind Robber) when joining forces with UNIT including Alistair Lethbridge-Stewart who'd been promoted to brigadier in stopping the Early Cyber-Faction's 1970's invasion of Earth, (TV: The Invasion) during his first encounter with Krotons, (TV: The Krotons) when foiling an Ice Warrior invasion of Earth led by Grand Marshall Skarrg, (TV: The Seeds of Death) during the First Omega Crisis, (TV: The Three Doctors) when braving Borusa's Game of Rassilon, (TV: The Five Doctors) when confronting Maurice Caven, (TV: The Space Pirates) when helping his past and future incarnations during the Fall of Gallifrey, (TV: The Day of the Doctor) and his confrontation with the War Lord and the War Chief on War World as well as his first trial and his forced regeneration. (TV: The War Games) His successor, the Third Doctor, wore it briefly when beginning his exile. (TV: Spearhead from Space)
The Fourth Doctor many double-breasted frock coats with peaked lapels. He wore a frock coat of mahogany brown velvet when he met Sutekh and some servitors dressed as mummies on 1911 (TV: Pyramids of Mars), during the incident with the Mandragora Helix (TV: The Masque of Mandragora), during his reluctant separation with Sarah Jane Smith after defeating Eldrad (TV: The Hand of Fear), and when facing the Decayed Master and Chancellor Goth (TV: The Deadly Assassin). He also wore one of chocolate brown velvet when he first met Leela (TV: The Face of Evil), when confronting the Fendahl, (TV: Image of the Fendahl), when facing the Oracle on the R1C (TV: Underworld), when foiling the Sontaran Special Space Service's invasion of Gallifrey and saying goodbye to Leela and K9 Mark I before building K9 Mark II (TV: The Invasion of Time) when he first meets the White Guardian and Romana I (TV: The Ribos Operation), when facing Queen Xanxia and the Captain on Zanak and Calufrax during 1978 (TV: The Pirate Planet), when meeting Cessair of Diplos and some Megara (TV: The Stones of Blood), and when foiling Count Grendel of Gracht on Tara (TV: The Androids of Tara). He notably wore a frock coat of grey tweed with a brown corduroy collar and cuffs when foiling the Kraal's plan to conquer Earth with androids in 1980 (TV: The Android Invasion), during his first encounter with Morbius and the Sisterhood of Karn (TV: The Brain of Morbius), during his first encounter with Krynoids (TV: The Seeds of Doom), when facing a Rutan scout during the Fang Rock Incident (TV: Horror of Fang Rock), when first meeting Professor Marius and K9 Mark I when facing the Nucleus of the Swarm on the Titan Base of the Bi-Al Foundation round 5000 AD, (TV: The Invisible Enemy), when facing the Collector of Megropolis One (TV: The Sun Makers) and when helping his past and future selves foil the Tremas Master and Autons as well as when he witnessed Adam Mitchell's fall (COMIC: Endgame) . He wore a taupe tweed frock when foiling Kroll, (TV: The Power of Kroll), the Black Guardian (TV: The Armageddon Factor), a reawakened Davros during a war between the Dalek Empire and the Movellans (TV: Destiny of the Daleks), and Scaroth (TV: City of Death), and when helping his past and future selves during the Fall of Gallifrey (TV: The Day of the Doctor).
The Fifth Doctor wore a beige frock coat with notched lapels and a scarlet trim; (TV: Castrovalva) most notably when facing Monarch, (TV: Four to Doomsday) during his first encounter with the Mara and the Kinda, (TV: Kinda) during his first encounter with Terileptils, (TV: The Visitation) during his encounter with George Cranleigh, (TV: Black Orchid) when helping his past and future incarnations foil the Tremas Master and witnessing Adam Mitchell's fall, (COMIC: Endgame) when witnessing Adric's death and foiling the Neomorph Cyberman 2526 invasion of Earth, (TV: Earthshock) when saving passengers from the Tremas Master, (TV: Time Flight) during the Second Omega Crisis, (TV: Arc of Infinity) when first meeting Vislor Turlough and solving the mystery of Alistari Lethbridge-Stewart's amnesia during his encounter with Mawdryn, (TV: Mawdryn Undead) when saying goodbye to Nyssa, (TV: Terminus) during his first encounters with Eternals as well as his rematch with the Black Guardian and his reunion with the White Guardian, (TV: Enlightenment) when freeing Kamelion from the Tremas Master, (TV: The King's Demons) when braving Borusa's Game of Rassilon, (TV: The Five Doctors) when helping his past and future incarnations during the Fall of Gallifrey, (TV: The Day of the Doctor) and before facing a Silurian/Sea Devil raid on Sea Base 4. (TV: Warriors of the Deep)
The Sixth Doctor initially wore a patchwork frock coat with peaked lapels as well as several different colours and fabrics; (TV: The Twin Dilemma) most notably during the 1985 Cyberman Invasion of Earth, (TV: Attack of the Cybermen), his first encounter with Mentors, (TV: Vengeance on Varos) when foiling the Tremas Master and the First Rani on Killingworth during the 19th century, (TV: The Mark of the Rani), when saving his second incarnation from Androgums and leading members of the Ninth Sontaran Battle Group, (TV: The Two Doctors) when confronting the Borad, (TV: Timelash) when dealing with Davros and his Necros Daleks during the Necros Incident, (TV: Revelation of the Daleks) when helping to foil the Tremas Master and witnessing Adam Mitchell's fall, (COMIC: Endgame) when helping his past and future incarnations during the Fall of Gallifrey, (TV: The Day of the Doctor) and during his show trial forged by the Valeyard to frame him and justify killing him so he can claim his remaining lives. (TV: The Mysterious Planet-The Ultimate Foe) He replaced with a similar coat in azure blue for a period (AUDIO: Real Time onwards) before returning to the original up to his death. (AUDIO: The Brink of Death; TV: Time and the Rani)
The Seventh Doctor spent his first hours in the Sixth Doctor's patchwork frock coat. He also tried a copy of the Fifth Doctor's beige frock coat with a scarlet trim for a silver grey safari jacket. (TV: Time and the Rani)
The Eighth Doctor wore many double-breasted frock coats of velvet with peaked lapels done in forest green, (TV: Doctor Who) navy blue, (COMIC: Dreadnought) hunter green, (AUDIO: Storm Warning) olive green, (COMIC: Ophidius) or dark brown. (PROSE: The Year of Intelligent Tigers) He notably wore his another green frock coat when helping his past and future incarnations during the Fall of Gallifrey. (TV: The Day of the Doctor)
On the Titanic launching of 1912, the Ninth Doctor wore an ebony black moleskin frock coat with peaked lapels. (TV: Rose)
During his retirement to the Victorian era, the Eleventh Doctor wore a single-breasted frock coat of wine purple moleskin with black lamb fur lining and peaked lapels. (TV: The Great Detective, The Snowmen) He also wore it during his travels with Valarie Lockwood; (AUDIO: The Inheritance-Victory of the Doctor) most notably when dealing with the New Dalek Paradigm including Special Weapons Daleks. (AUDIO: Daleks Victorious-Victory of the Doctor) When travelling with Clara Oswald, he wore a single-breasted frock coat of eggplant purple cashmere with notched lapels; (TV: The Bells of Saint John, etc) most notably when meeting Grand Marshal Skaldak of the Ice Warriors, (TV: Cold War) during his first encounter with Weapons-Grade Cybermen, (TV: Nightmare in Silver) when foiling the Tremas Master and witnessing Adam Mitchell's fall, (COMIC: Endgame) and when helping to foil the 1562/2013 Zygon Invasion of Earth and helping to save Gallifrey during its 'fall'. (TV: The Day of the Doctor) He wore his wine frock coat during the Siege of Trenzalore; and then his eggplant frock coat before his regeneration. (TV: The Time of the Doctor)
The Twelfth Doctor wore the Eleventh Doctor's cashmere frock coat during his first hours. (TV: The Time of the Doctor, Deep Breath) He occasionally wore a single-breasted frock coat of raven black velvet with cornflower blue lining, (TV: The Pilot) or ebony black linen. (TV: World Enough and Time|The Doctor Falls, Twice Upon A Time)
The Fugitive Doctor wore a navy morning coat, similar to a frock coat but with declining tails. (TV: Fugitive of the Judoon, The Timeless Children, Once, Upon Time)
The Curator, taking the form of an older Sixth Doctor, wore frock coats; one of violet moleskin, (AUDIO: Crossed Lines) and one of burgundy and peach pinstripe. (AUDIO: The Artist at the End of Time)
Worn by Companions[]
Romana wore frock coats on rose pink, (TV: Destiny of the Daleks) or scarlet, (TV: The Horns of Nimon).
Graham O'Brien wore a grey tweed morning coat during a trip to New York during 1903. (TV: Nikola Tesla's Night of Terror).
Worn by the Master[]
Some versions of the Master wore frock coats.
The War Master wore a battleship grey tweed frock coat with peaked lapels. (AUDIO: Masterful)
The Saxon Master wore a black, asymmetrical frock coat, (TV: World Enough and Time) right up to his death. (TV: The Doctor Falls)
Worn by others[]
Gabriel Sneed wore a black frock coat when he met the Ninth Doctor, Rose Tyler, and the Gelth on 1869. (TV: The Unquiet Dead)
Mr Scoones, Mr Cole, Mr Fetch and Mr Milligan wore black frock coats up to when they died during the 1851 Incident. (TV: The Next Doctor)
Webley wore a double breasted frock coat of bottle green tweed with a scarlet overcheck up to his death during the Battle of Hedgewick's World of Wonders. (TV: Nightmare in Silver)
Doctor Ogron wore a copy of the Eighth Doctor's forest green frock coat. (AUDIO: Planet of the Ogrons)
The Spae Wife wore a double-breasted frock coat in crimson with raven black lapels and cuffs as well as gold trims in 19th century Ireland. (AUDIO: Feast of Fear)
Rhys Williams wore a black frock coat when he married Gwen Cooper. (TV: Something Borrowed)
Edward Waterfield and Theodore Maxtible wore frock coats; Edward's navy and Theodore's charcoal. Both did this during the Dalek Empire's Operation Human Factor. (TV: The Evil of the Daleks)