- Will Hay
- William Potts / Muller
- Charles Hawtrey
- Max
- Peter Croft
- Hans
- Barry Morse
- Kurt
- Peter Ustinov
- Krauss
- Anne Firth
- Lena
- Frank Pettingell
- Prof. Hoffman
- Leslie Harcourt
- Vogel
- Julien Mitchell
- Gen. Von Goltz
- Jeremy Hawk
- A.D.C.
- Raymond Lovell
- Schmidt
- Aubrey Mallalieu
- Rector
- John Williams
- Maj. Bishop
- Lawrence O'Madden
- Col. Truscott
- John Boxer
- British Pilot
- Clifford Buckton
- MI5 Man
- Arthur Denton
- Detective Carter
- Leslie Dwyer
- German Soldier on Train
- Victor Fairley
- Member of the General Staff
- Richard George
- German Pilot
- Walter Gotell
- SS Guard
- William Hartnell
- German Officer at Station
- Bryan Herbert
- Airport Official
- Vincent Holman
- Member of the General Staff
- Charles Paton
- Passenger Arrested on Train
- Lloyd Pearson
- Train Passenger
- Arthur Ridley
- Role undetermined
- Johnnie Schofield
- 1st Observer
- Harry Terry
- SS Guard
- Jack Vyvyan
- Detective Evans
- H Victor Weske
- SS Officer on Train
