- Leslie Howard
- Professor Horatio Smith
- Allan Jeayes
- Dr. Benckendorf
- Francis L. Sullivan
- General von Graum
- Mary Morris
- Ludmilla Koslowski
- Hugh McDermott
- David Maxwell
- Raymond Huntley
- Marx
- Manning Whiley
- Bertie Gregson
- Peter Gawthorne
- Sidimir Koslowski
- Dennis Arundell
- Hoffman
- Joan Kemp-Welch
- School-Teacher
- Philip Friend
- Spencer
- Laurence Kitchin
- Clarence Elstead
- David Tomlinson
- Steve
- Basil Appleby
- Jock MacIntyre
- Percy Walsh
- Dvorak
- A.E. Matthews
- Earl of Meadowbrook
- Aubrey Mallalieu
- Dean
- Ben Williams
- Graubitz
- Ernest Butcher
- Weber
- Arthur Hambling
- Jordan
- Mary Brown
- Betty
- W. Phillips
- Innkeeper
- Ilse Bard
- Gretchen
- Ernest Verne
- Hans
- George Street
- Schmidt
- Hector Abbas
- Karl Meyer
- Neal Arden
- Second Prisoner
- Roland Pertwee
- Embassy Official - Sir George Smith
- Richard George
- Prison Guard
- Roddy Hughes
- Zigor
- Hugh Pryse
- Wagner
- Oriel Ross
- Lady Willoughby
- Bryan Herbert
- Jaromir
- Suzanne Clair
- Salesgirl
- Charles Paton
- Steinhof
- Michael Brennan
- Camp Guard with Lantern
- Elwyn Brook-Jones
- Bit Part
- Sebastian Cabot
- Bit Role
- Peter Cozens
- Man
- Arthur Denton
- Gestapo Man Following Smith
- Irene Handl
- Bit Part
- Adolf Hitler
- Self
- Vincent Holman
- Doctor at Diggings
- Ronald Howard
- Minor Role
- Stuart Latham
- Telephone Operator
- Michael Rennie
- Prison Camp Officer
- Charles Rolfe
- German Officer at Customs
- John Slater
- Reporter
- Harry Terry
- Camp Guard
