Waistcoat

A waistcoat was an article of clothing.

Worn by the Doctor
Many incarnations of the Doctor wore waistcoats.

The First Doctor wore a beige tweed waistcoat with a fob watch. (TV: An Unearthly Child, The Daleks, et al.)

The Second Doctor sometimes wore waistcoats. (PROSE: Daleks Invade Zaos, Golem)

The Third Doctor wore a grey waistcoat with symbols when he first went to Peladon. (TV: The Curse of Peladon)

The Fourth Doctor wore checked waistcoats done in tan, (TV: Terror of the Zygons) or yellow; (TV: City of Death) and also wore some in wine purple, (TV: The Ribos Operation) and burgundy. (TV: The Leisure Hive)

The Sixth Doctor wore waistcoats on many styles. He first wore a knitted waistcoat that was dark brown, orange and purple in colour and featured dark green buttons, along with a dark green metal watch chain, (TV: The Twin Dilemma) a dark purple squared waistcoat, (PROSE: Burning Heart) a waistcoat with tweed pattern on the right side and a zig-zag pattern on the left, (PROSE: Time Wake) a plain brown waistcoat, (COMIC: Virtually Indestructible) a plain violet waistcoat, (COMIC: Endgame) and another with a blue striped theme. (AUDIO: Year of the Pig) He occasionally wore a navy blue one (WC: Real Time) and also wore a brown and crimson tweed waistcoat with his 'Bletchley Tweeds'. (AUDIO: Criss-Cross, Quicksilver) He also wore a maroon waistcoat when he reunited with Peri Brown on the Memory TARDIS. (TV: Vengeance on Varos) His most prominent waistcoat became a red and white gingham waistcoat with bear face buttons, (TV: The Mysterious Planet) which he wore up to his death. (TV: Time and the Rani)

Right up to his death, the Seventh Doctor wore a scarlet brocade waistcoat. (TV: Doctor Who)

The Eighth Doctor wore some double breasted waistcoats of paisley-brocade with a gold fobwatch. (TV: Doctor Who) Soon, he wore a single breasted waistcoat of mustard yellow velvet,(COMIC: The Pictures of Josephine Day) and also some of paisley-brocade done in wine, (AUDIO: He Kills Me, He Kills Me Not,) vermillion, (AUDIO: Meanwhile, Elsewhere-Previously, Next Time) or bronze. (TV: The Night of the Doctor)

The War Doctor wore double-breasted moleskin waistcoats with fob watches under his leather trenchcoats, either ginger, (COMIC: The Clockwise War) mahogany, (COMIC: The Whole Thing's Bananas) mustard yellow, (COMIC: First Rule-Fast Asleep) or dark green-brown, (TV: The Name of the Doctor, The Day of the Doctor) with 10 brass buttons and a fob chain attached to it.

When posing as John Smith, the Tenth Doctor wore a charcoal tweed waistcoat. (TV: Human Nature/The Family of Blood)

During his retirement to the Victorian era, the Eleventh Doctor wore a single-breasted waistcoat of plum purple velvet with a pocket watch. (TV: The Great Detective, The Snowmen) He also wore a grey moleskin waistcoat, (TV: The Rings of Akhaten) a six-buttoned black velvet waistcoat with lapels, (TV: Nightmare in Silver) before switching it with a light check pattern black waistcoat with smaller lapels. (TV: The Day of the Doctor) While in Victorian Yorkshire, the Doctor wore a brown chequered version of his burgundy attire. (TV: The Crimson Horror) He wore the plum purple velvet one on Trenzalore, and switched for the black one with the light cheque before his death. (TV: The Time of the Doctor)

The Twelfth Doctor sometimes wore waistcoats. (TV: Mummy on the Orient Express, Thin Ice)

The Thirteenth Doctor wore a blue waistcoat with clock symbols during her first encounter with Ashad. (TV: The Haunting of Villa Diodati)

The Fourteenth Doctor wore a single-breasted waistcoat of dark maroon and turquoise tartan, (TV: The Power of the Doctor) which he soon replaced with one in plum and black. (COMIC: Liberation of the Daleks)

The Fugitive Doctor wore a double-breasted waistcoat of Prussian blue tweed. (TV: Fugitive of the Judoon, The Timeless Children, Once, Upon Time, The Power of the Doctor)

The Curator, a future form of the Doctor, wore single-breasted waistcoats when taking the form of an older Sixth Doctor; one black with mustard yellow stripes and royal yellow trims, (AUDIO: Crossed Lines) and one of amber and bronze brocade. (AUDIO: The Artist at the End of Time)

A parallel version of the Doctor wore a single-breasted waistcoat of charcoal and sapphire tartan when he and Bernice Summerfield fought Faction Cybermen on Nazi Germany. (AUDIO: Blood and Steel) Another parallel version known as the Warrior wore a double breasted waistcoat of dark green-brown moleskin with 10 brass buttons and a fob chain similar to the N-Space version's war incarnation. (AUDIO: Aftershocks)

Worn by companions
Sarah Jane Smith sometimes wore waistcoats of black pinstripe. (TV: The Stolen Earth|Journey's End, The Last Sontaran, The Day of the Clown, Enemy of the Bane, The Mad Woman in the Attic, The Eternity Trap, Goodbye, Sarah Jane Smith) She also wore waistcoats in cream; (TV: The Gift, Lost in Time, Sky, The Curse of Clyde Langer) and also in tan. (TV: Death of the Doctor)

Romana II wore a gold waistcoat. (TV: The Horns of Nimon; COMIC: Time Lady of Means)

Ryan Sinclair and Graham O'Brien sometimes wore waistcoats. (TV: Nikola Tesla's Night of Terror, The Haunting of Villa Diodati)

Yasmin Khan wore a beige waistcoat. Dan Lewis wore a navy blue waistcoat. (TV: Survivors of the Flux, The Vanquishers)

Jo Grant wore a plum purple waistcoat when she first meets the Third Doctor. (TV: Terror of the Autons)

While acting as his successor, Jack Harkness wore the Sixth Doctor's coat, including his seventh favourite waistcoat. (AUDIO: Piece of Mind)

Jamie McCrimmon wore a charcoal grey waistcoat when he reunited with Zoe Heriot in the Memory TARDIS. (TV: The Mind Robber)

Worn by the Master
Many versions of the Master wore waistcoats.

The Tremas Master wore a silver waistcoat when he met the Seventh Doctor, Ace, and the Cheetah People. (TV: Survival)

As John Smith, the Decayed Master wore a charcoal waistcoat. (AUDIO: Master)

The War Master wore many waistcoats done in green-and-brown stripes cotton, (AUDIO: The Master of Callous) gunmetal grey tweed, (AUDIO: Rage of the Time Lords) dark beige tweed, (AUDIO: Day of the Master) mustard yellow moleskin, (AUDIO: Killing Time) or wine brocade. (TV: Utopia)

The Spy Master wore a plaid moleskin waistcoat and trousers with a pattern of three vertical stripes interlocking with three lines of horizontal dashes, in varying shades of orange over a navy background.

Worn by others
Jenny Flint wore single breasted waistcoats done in blue (TV: A Good Man Goes to War) or grey. (COMIC: The Lost Dimension)

Emily Morris wore a cream waistcoat with tan stripes. (TV: Lost in Time)

Henry Jago and George Litefoot wore double breasted waistcoats. (TV: The Talons of Weng-Chiang)

When he thought he was the Doctor, Jackson Lake wore a double-breasted waistcoat of scarlet brocade under his tweed overcoat. (TV: The Next Doctor)

Mr Copper wore a waistcoat of olive green tweed. (TV: Voyage of the Damned)

The Dream Lord wore a beige waistcoat with his tweed suit when he taunted the Eleventh Doctor, Amy Pond, and Rory Williams during the beginning of the Eknodine assault. (TV: Amy's Choice)

The Ringmaster of the Psychic Circus wore a double-breasted waistcoat of rainbow fabric. (TV: The Greatest Show in the Galaxy)

The Pied Piper wore a black waistcoat when posing as Mr. Spellman, director of Spellman's Magical Museum of the Circus. (TV: The Day of the Clown)

Verity Newman wore a charcoal waistcoat with her lavender blouse when she met the Tenth Doctor. (TV: The End of Time)

Theodore Maxtible wore a black waistcoat. Edward Waterfield also wore a maroon waistcoat. (TV: The Evil of the Daleks)