The tailcoat was a knee-length coat characterised by a rear section of the skirt, known as the tails, with the front of the skirt cut away; a predecessor of the frock coat.
Worn by the Doctor[]
The Eleventh Doctor wore a black tailcoat on the wedding of Amy Pond and Rory Williams, (TV: The Big Bang) when confronting the Teselecta while dying of poisoning, (TV: Let's Kill Hitler [+]Steven Moffat, Doctor Who series 6 (BBC One, 2011).) and during trips with River Song. (HOMEVID: First Night, Last Night)
Worn by Companions[]
Josie Day wore a double breast tailcoat done on steel blue without sleeves. (COMIC: A Matter of Life and Death, The Lost Dimension)
Worn by Others[]
Charles Cranleigh wore a crimson tailcoat as part of his Georgian costume in a party round Cranleigh Hall on 1925. (TV: Black Orchid)
Sutcliffe wore a royal blue tailcoat. (TV: Thin Ice)
The Pied Piper wore a scarlet tailcoat when posing as Mr. Spellman, director of Spellman's Magical Museum of the Circus. (TV: The Day of the Clown)
The Ringmaster of the Psychic Circus wore a midnight blue tailcoat with rainbow lapels. (TV: The Greatest Show in the Galaxy)
The Toymaker wore a black tailcoat when doing a mock dance with the Fourteenth Doctor in London during 2023. (TV: The Giggle)
Popplewick, the human disguise of the Valeyard, wore a double-breasted tailcoat in ebony. (TV: The Ultimate Foe)