Will Hay

William Potts / Muller

Frank Pettingell

Professor Hoffman

Julien Mitchell

General Von Glotz

Charles Hawtrey

Max

Barry Morse

Kurt

Peter Ustinov

Krauss

Peter Croft

Hans

Anne Firth

Lena

Leslie Harcourt

Vogel

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 (uncredited)

Arthur Denton

Detective Carter (uncredited)

Leslie Dwyer

German Soldier on Train

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

Johnnie Schofield

1st Observer (uncredited)

Harry Terry

SS Guard (uncredited)

Jack Vyvyan

Detective Evans (uncredited)

H Victor Weske

SS Officer on Train (uncredited)