Alan Shearman as Capt. Hugh (Bullshot) Crummond

Diz White as Rosemary Fenton

Ronald E. House as Count Otto van Bruno

Frances Tomelty as Fräulein Lenya von Bruno

Mel Smith as Crouch

Michael Aldridge as Prof. Rupert Fenton

Christopher Good as Lord Binky Brancaster

Billy Connolly as Hawkeye McGillicuddy

Geoffrey Bayldon as Col. Hinchcliff

Ron Pember as Dobbs

Angela Thorne as Hotel Manageress

Peter Bayliss as Chairman of the Institute

Nicholas Lyndhurst as Nobby Clark

Bryan Pringle as Waiter

Albert Evansky as Albert Einstein