A jacket was an item of clothing worn on the upper body, often over a shirt, waistcoat and/or jumper.
The Doctor wore several different kinds of jackets throughout his life. The First Doctor wore a dark lounge jacket for much of his life, (TV: An Unearthly Child - The Tenth Planet) while the Second Doctor wore a rumpled black suit jacket for all of his. (TV: The Power of the Daleks onwards) The Third Doctor alternated between numerous velvet smoking jackets of many different colours, (TV: Spearhead from Space - Planet of the Spiders) and the Fourth Doctor briefly adopted two different corduroy jackets, a red shooting jacket immediately following his regeneration (TV: Robot - Planet of Evil) and a burgundy jacket close to the end of his life. (TV: The Leisure Hive)
The Seventh Doctor wore several jackets of varied colour, initially adopting an off-white safari-style jacket (TV: Time and the Rani onwards) which he later replaced with a chocolate brown one. (TV: Battlefield onwards) He introduced several others, including a cream one made of linen (PROSE: White Darkness onwards) and another, lighter brown one, this time made of tweed, (TV: Doctor Who) later in his life.
The Eighth, (AUDIO: The Great War) War (TV: The Day of the Doctor) and Ninth Doctors (TV: Rose) all wore jackets made of leather, while the Tenth Doctor wore two different pinstripe jackets as part of his pair of pinstripe suits. (TV: The Christmas Invasion, Smith and Jones)
The Eleventh Doctor wore several jackets made of tweed, initially adopting one made of a simple Donegal tweed, (TV: The Eleventh Hour - The Big Bang) which he briefly replaced with a Harris tweed (TV: Victory of the Daleks - Flesh and Stone) before adopting a new jacket in a Shetland tweed, which he used as part of his regular attire until the end of his search for Clara Oswald. (TV: A Christmas Carol - The Angels Take Manhattan)
Ace wore a bomber jacket covered in patches, badges and pins, among them a Charlton Athletic badge, (TV: The Happiness Patrol) Flowerchild's earring, (TV: The Greatest Show in the Galaxy, Silver Nemesis) and Captain Sorin's shiny cap insignia. (TV: The Curse of Fenric, Survival)
The Fliis took the form of leather jackets so they could bond with humans as part of their plan to invade 20th century Earth. (COMIC: Fashion Victims)