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)

Peter Glenville