"The Four Men of the title are British WWI veterans who decide to work secretly against enemies of the country. They aren't above a bit of murder or sabotage to serve their ends, but they consider themselves to be true patriots."
Hugh Sinclair
as Humphrey Mansfield
Griffith Jones
as James Brodie
Francis L. Sullivan
as Leon Poiccard
Frank Lawton
as James Terry
Anna Lee
as Ann Lodge
Alan Napier
as Sir Hamar Ryman M.P.
Basil Sydney
as Frank Snell
Lydia Sherwood
as Myra Hastings
Edward Chapman
as B.J. Burrell
Athole Stewart
as Police Commissioner
George Merritt
as Inspector Falmouth
Garry Marsh
as Bill Grant
Ellaline Terriss
as Lady Willoughby
Roland Pertwee
as Mr Hastings
Eliot Makeham
as Simmons
Frederick Piper
as Pickpocket (uncredited)
Henrietta Watson
as Mrs. Truscott
Jon Pertwee
as Rally campaigner (uncredited)
Liam Gaffney
as Taxi driver (uncredited)
Manning Whiley
as (uncredited)
Neal Arden
Basil Radford
Edward Rigby
Paul Sheridan
Winston Churchill
as Self (archive footage) (uncredited)
Arthur Hambling
as Constable Benham
Bryan Herbert
Adolf Hitler
James Knight
as Policeman Outside Parliament (uncredited)
Percy Parsons
as American Broadcaster (uncredited)
Charles Paton
as Platform Speaker (uncredited)
Percy Walsh
as Prison Governor (uncredited)
Walter Forde
Director
Edgar Wallace
Novel
Angus MacPhail
Writer
Sergei Nolbandov
Michael Balcon
Producer
S.C. Balcon
Associate Producer
Ernest Irving
Music
Ronald Neame
Director of Photography
Charles Saunders
Editor
Wilfred Shingleton
Art Direction