Tartan

Tartan, also called plaid, was a type of pattern, famously linked to Scotland.

The Sixth Doctor's coat featured patches of red tartan. (TV: The Twin Dilemma-Time and the Rani)

The Fourth Doctor wore a Clan Wallace tartan scarf during his encounter with the Zygons. (TV: Terror of the Zygons)

For a while, the Seventh Doctor wore a crimson and black tartan scarf. (TV: Time and the Rani) He also wore plaid trousers done in grey brown, (TV: Time and the Rani) or green. (TV: Doctor Who)

The Third Doctor wore inverness capes of tartan done on scarlet and green (TV: The Curse of Peladon) or brown. (TV: The Five Doctors)

The First Doctor wore grey tartan trousers. (TV: An Unearthly Child-The Tenth Planet, The Three Doctors, The Five Doctors, Twice Upon A Time)

The Second Doctor wore tartan trousers done in grey, (TV: The Power of the Daleks-The War Games, The Three Doctors, The Five Doctors, The Two Doctors) or yellow with green stripes. (COMIC: Comic Relief Comic)

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

Clara Oswald wore a Clan Campbell tartan dress when she sacrificed herself to save the Eleventh Doctor from the Great Intelligence's master plan. (TV: The Name of the Doctor) She also wore a Clan Wallace tartan skirt with her black cardigan and her white blouse. (TV: The Time of the Doctor, Deep Breath)

Yasmin Khan wore a cravat of bronze tartan. (TV: Survivors of the Flux, The Vanquishers)

Jo Grant wore an asymmetrical jacket of chestnut and scarlet tartan during the Spiridon Incident. (TV: Planet of the Daleks)

Jeremiah O'Kane owned a tartan blanket. (HOMEVID: The Zero Imperative)

The Twelfth Doctor wore baggy tartan trousers in gunmetal grey, (TV: The Doctor's Meditation) Prussian blue and alabaster, (TV: The Girl Who Died) navy and crimson, (TV: The Woman Who Lived) or bottle green. (COMIC: The Ministry of Time)

Professor Rachel Jensen wore a skirt of grey and brown tartan when she helped the Seventh Doctor during the Hand of Omega Incident. (TV: Remembrance of the Daleks)

The Master's war incarnation wore a chocolate and ebony tartan ulster coat during his encounter with Sherlock Holmes, John Watson, and James Moriarty in the Land of Fiction. (AUDIO: The Adventure of the Deceased Doctor) His spy incarnation also wore a single-breast 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 blue background. (TV: Spyfall, Ascension of the Cybermen, The Timeless Children)