- James Robertson Justice
- Sir Ernest Pease KBE FRS / Lt. Farrow RN
- Leslie Phillips
- Flying Officer Jimmy Cooper DFC
- Stanley Baxter
- 'Jock' Everett / Kommondant Stamfel
- Eric Sykes
- Willoughby, Sports Officer
- Richard Wattis
- Woodcock, Entertainments Officer
- Godfrey Winn
- Self
- Colin Gordon
- Briggs
- John Le Mesurier
- Piggott, Escape Officer
- Norman Bird
- Travers, Senior British Officer
- Jeremy Lloyd
- Flt Lt. 'Bonzo' Baines DFC
- John Forrest
- 'Grassy' Green
- Jean Cadell
- Lady Telling Story on TV show - Opening Scene
- Peter Myers
- P / O P R Shaw
- Ronnie Stevens
- Hankley
- Ronald Leigh-Hunt
- Clynes
- Steve Plytas
- Luftwaffe Officer
- John Ringham
- P / O G S 'Plum' Pouding
- Joseph Fürst
- Luftwaffe Interrogator
- Norman Shelley
- Fred Whittaker
- Brian Oulton
- 1st Scientist in Corridor
- Frederick Piper
- 2nd Scientist in Corridor
- Joan Haythorne
- Miss Rogers
- Heidi Erich
- German Frau
- Derek Aylward
- Stagehand
- Vincent Ball
- Higgins
- Tony Castleton
- Stagehand
- Billy Cornelius
- German Guard
- Dan Darnelli
- Messenger
- Hugo De Vernier
- Swiss Commissioner
- Jack Dearlove
- Prisoner of War
- Ed Devereaux
- Webber
- Archie Duncan
- Scottish Captain
- Hugh Elton
- RAF Officer
- Roy Everson
- Prisoner of War
- Ernest Fennemore
- Prisoner of War
- Chick Fowles
- Prisoner of War
- Fred Haggerty
- German Guard
- Patrick Halpin
- TV Crew
- Peter Hannon
- German Guard
- Victor Harrington
- Prisoner of War
- John Herrington
- Swiss Commissioner
- Norman Lambert
- Prisoner of war
- Barry Lowe
- Forger
- Ned Lynch
- Prisoner of War
- Fred Machon
- German Guard
- Richard Marner
- German Guard
- Nancy Nevinson
- German Frau
- Ian Parsons
- Swiss Commissioner
- Cecil Paul
- Official
- Keith Peacock
- German Guard
- Joe Phelps
- German Guard
- Charles Price
- Stagehand
- Prunella Smith
- TV Show Audience
- Reg Thomason
- TV Show Audience
- Martin Voss
- German Guard
- Robert Vossler
- Audience Member
- David Webb
- (uncredited)
- Winnie Wiblin
- Guest
- John Wilder
- Audience Member
