Humphrey Mansfield
Hugh Sinclair
James Brodie
Griffith Jones
Inspector Falmouth
George Merritt
Bill Grant
Garry Marsh
Lady Willoughby
Ellaline Terriss
Mr Hastings
Roland Pertwee
Simmons
Eliot Makeham
Pickpocket (uncredited)
Frederick Piper
Mrs. Truscott
Henrietta Watson
Rally campaigner (uncredited)
Jon Pertwee
Taxi driver (uncredited)
Liam Gaffney
(uncredited)
Manning Whiley
Leon Poiccard
Francis L. Sullivan
Neal Arden
Basil Radford
Edward Rigby
Paul Sheridan
Self (archive footage) (uncredited)
Winston Churchill
Constable Benham
Arthur Hambling
Bryan Herbert
Adolf Hitler
Policeman Outside Parliament (uncredited)
James Knight
American Broadcaster (uncredited)
Percy Parsons
James Terry
Frank Lawton
Platform Speaker (uncredited)
Charles Paton
Prison Governor (uncredited)
Percy Walsh
Ann Lodge
Anna Lee
Sir Hamar Ryman M.P.
Alan Napier
Frank Snell
Basil Sydney
Myra Hastings
Lydia Sherwood
B.J. Burrell
Edward Chapman
Police Commissioner
Athole Stewart
Writer
Novel
Edgar Wallace
Director
Walter Forde
Angus MacPhail
Producer
Michael Balcon
Director of Photography
Ronald Neame
Sergei Nolbandov
Editor
Charles Saunders
Art Direction
Wilfred Shingleton
Associate Producer
S.C. Balcon
Music
Ernest Irving