Romana wearing a flat cap. (TV: The Stones of Blood [+]David Fisher, Doctor Who season 16 (BBC1, 1978).)
A flat cap was a type of hat.
Following his regeneration, the Third Doctor tried on a flat cap. Upon looking in a mirror, he decided against wearing it. (TV: Spearhead from Space [+]Robert Holmes, Doctor Who season 7 (BBC1, 1970).)
Romana I wore a flat cap of tartan on her first visit to Earth. (TV: The Stones of Blood [+]David Fisher, Doctor Who season 16 (BBC1, 1978).)
Professor Jericho and Dan Lewis wore flat caps of herringbone-tweed during the early 1900s. (TV: Survivors of the Flux|The Vanquishers)
Wilfred Mott was wearing a flat cap of houndstooth tweed when the Fourteenth Doctor and Donna Noble returned to Camden Market from the edge of the universe. (TV: Wild Blue Yonder [+]Russell T Davies, Doctor Who 60th Anniversary Specials (BBC One and Disney+, 2023).)
