The Third Doctor uses Venusian karate to defend himself. (COMIC: The Celluloid Midas [+]Dennis Hooper, TVA comic stories (Polystyle, 1971).)
Karate was a form of martial arts.
Space Security Service agents were trained in dakaro, a kind of karate which used pressure to cause spine dislocation. (COMIC: Sara Kingdom: Space Security Agent [+]Brad Ashton and Terry Nation, The Dalek Outer Space Book (Dalek annuals, Panther Books, 1966).)
Jo Grant claimed that she was "pretty nifty at karate" and that she once rendered Sgt. Benton unconscious. (AUDIO: Ghost in the Machine [+]Jonathan Morris, The Companion Chronicles (Big Finish Productions, 2013).)
Stuart Dale did karate at school. (AUDIO: The Blood Furnace [+]Eddie Robson, Main Range (Big Finish Productions, 2017).)
Sarah Jane Smith knew Venusian karate, (TV: A Girl's Best Friend [+]Terence Dudley, BBC1 (1981).) as did the Doctor. They employed it in their third, (COMIC: The Celluloid Midas [+]Dennis Hooper, TVA comic stories (Polystyle, 1971).) fifth, (PROSE: First Born [+]Lizzie Hopley, Short Trips: The Centenarian (Short Trips short stories, 2006).) sixth, (AUDIO: Last of the Cybermen [+]Alan Barnes, Main Range (Big Finish Productions, 2015).) , and twelfth incarnations, (COMIC: Terrorformer [+]Robbie Morrison, Doctor Who: The Twelfth Doctor (Titan Comics, 2014).)
The Third Doctor also knew Martian karate, which he tried using on the Primords after Venusian aikido failed, to no avail. (PROSE: Inferno [+]Terrance Dicks, adapted from Inferno (Don Houghton), Target novelisations (Target Books, 1984).)
