Frances Gray

Margaret Lockwood

Bill Casey

Dane Clark

Commandant Anton Razinski

Marius Goring

Mr. Hedgerley

Naunton Wayne

Mr. Luke

Wilfrid Hyde-White

Detective-Interrogator

Olaf Pooley

Alf

Eugene Deckers

Joe

Eric Pohlmann

Attendant

Gladys Henson

Priest

Paul Hardtmuth

Lab Director Owens

Michael Hordern

Sandwich Stand Customer

George Benson

Judy

Joan Haythorne

Customs Officer

John Horsley

Customs Man

Patric Doonan

Operator (uncredited)

Anthony Newley

Wardress (uncredited)

Jill Balcon

Tom - Lab Assistant (uncredited)

Ernest Butcher

Night Field Telephone Officer (uncredited)

John Gabriel

Café Mimosa Patron (uncredited)

Hyma Beckley

Alan (uncredited)

Lance Secretan

Police Sergeant at Customs Café (uncredited)

John Boxer

Stewardess (uncredited)

Toni Frost

Frank Conway (uncredited)

Noel Johnson

The ‘Tail’ (uncredited)

Michael Ritterman

Train Passenger (uncredited)

Daniel Brown

Soldier at Station Checkpoint (uncredited)

Robert Cawdron

Officer at Station (uncredited)

Anton Diffring

Train Passenger in Platform Line-up (uncredited)

Charles Hammon

Waiter (uncredited)

Philo Hauser

Soldier at Station Check Point (uncredited)

John G. Heller

Customs Man (uncredited)

Sam Kydd

Soldier on Train (uncredited)

Richard Marner

Café Mimosa Waiter (uncredited)

Louis Matto

Train Passenger at Checkpoint (uncredited)

Dinah Sheridan

Enemy Scientist (uncredited)

Ewen Solon

Soldier at Station Checkpoint (uncredited)

Emile Stemmler

Day Sentry at First Checkpoint (uncredited)

Robert Vossler

Customs Officer (uncredited)

John Wilder

Café Mimosa Customer (uncredited)

Billy Wilmot