Alec Guinness
The Cardinal
Jack Hawkins
The Interrogator
Wilfrid Lawson
The Jailer
Kenneth Griffith
The Secretary
Jeanette Sterke
The Girl
Ronald Lewis
The Guard
Raymond Huntley
The General
Mark Dignam
The Governor
Gerard Heinz
The Doctor
Percy Herbert
Soldier (uncredited)
Oscar Quitak
Cafe Waiter (uncredited)
Denis Shaw
Plainclothesman (uncredited)