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 a black 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 during his first encounter with Zygons during their gambit with a Skarasen, (TV: Terror of the Zygons) during his first encounter with Morestrans when facing an anti-matter monster on Zeta Minor during 37166, (TV: Planet of Evil) 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 Collector of Megropolis One, (TV: The Sun Makers) 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 taupe tweed with a raven black velvet collar when foiling the Kraal's plan to conquer Earth with androids on 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 foiling Kroll, (TV: The Power of Kroll) when foiling the Black Guardian, (TV: The Armageddon Factor) when facing a reawakened Davros during a war between the Dalek Empire and the Movellans, (TV: Destiny of the Daleks) 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) when facing 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 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 tried on a Napoleonic frock coat in navy and ivory with gold epaulettes and a crimson trim. 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 forest 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) 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 helping to foil the 1562/2013 Zygon Invasion of Earth and helping to save Gallifrey during its 'fall', (TV: The Day of the Doctor) and before and after the Siege of Trenzalore. (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 tweed frock coat. (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) scarlet, (TV: The Horns of Nimon) or beige. (TV: State of Decay)
Charlotte Pollard wore a Napoleonic frock coat in scarlet with gold trims during her Christmas adventure. (AUDIO: Twenty-Four Doors in December-Winter of the Demon)
Graham O'Brien wore a grey tweed frockcoat during a trip to New York during 1903. (TV: Nikola Tesla's Night of Terror). He and Ryan Sinclair also wore black frock coats when they met Mary Shelley, Lord George Gordon Byron, John Polidori, Claire Clairmont, and Ashad on 1816. (TV: The Haunting of Villa Diodati)
Worn by the Master
Many 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)
The Spy Master wore a charcoal grey frock coat when confronting the Thirteenth Doctor on London during 1834. (TV: Spyfall)
Worn by others
The Toymaker wore a frock coat done in scarlet and ivory with gold trims as part of his drum major outfit when he plays the Spice Girls song Spice Up Your Life while messing with UNIT in London during 2023. (TV: The Giggle)
Charles Dickens and Gabriel Sneed wore black frock coats when they 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)
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)