Capt. William Paris
Alastair Sim
Angela Prout
Elizabeth Allan
Drill Sergeant
Cyril Chamberlain
Drill Corporal
Michael Ripper
Intellectual Corporal
Robin Bailey
Staff Sergeant
Michael Kelly
Soldier in Pub
Patrick Westwood
George Prout
Roland Culver
Soldier in Brains Trust audience
George Cole
Professor Mutch
Colin Gordon
Lady Dodd
Martita Hunt
Jessie
Janet Brown
Walter
Peter Martyn
Dr. Hector McAdam
Miles Malleson
Joseph Byres M.P.
Edward Chapman
Producer
Sidney Gilliat
Director of Photography
Jack Hildyard
Original Story
James Bridie
Director
Frank Launder
Screenplay
Sound Supervisor
John Cox
Editor
Thelma Connell
John Dighton