John Christopher Dixon (born 2 December 1942), billed as John D. Collins, is a British actor who played Flt. Lt. Fairfax, a stranded British airman in occupied France during World War II, in the BBC sitcom 'Allo 'Allo!. He is the actor to have been cast most frequently in writer/producer David Croft's hit sitcoms: a total of six different series and ten characters. (Via Wikipedia)