John Challis (born 16 August 1942) played Scorby in the Doctor Who television story The Seeds of Doom and voiced the fifth incarnation of Drax in the Big Finish audio story The Trouble with Drax.
He shared his memories of The Seeds of Doom in the documentary Podshock and the 111th edition of Big Finish's charity podcast series Toby Hadoke's Who's Round.
He is best known for his role as Boycie in the long-running comedy Only Fools and Horses. He also contributed to the charity reference book Behind the Sofa: Celebrity Memories of Doctor Who.
He was once married to Jean Challis.