Will Hay
William Potts / Muller
Frank Pettingell
Professor Hoffman
Julien Mitchell
General Von Glotz
Lawrence O'Madden
Col. Truscott
Clifford Buckton
MI5 Man (uncredited)
Arthur Denton
Detective Carter (uncredited)
Leslie Dwyer
German Soldier on Train
Richard George
German Pilot
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
Johnnie Schofield
1st Observer (uncredited)
Harry Terry
SS Guard (uncredited)
Jack Vyvyan
Detective Evans (uncredited)
H Victor Weske
SS Officer on Train (uncredited)
