Highly Dangerous

Margaret Lockwood

— Frances Gray

Dane Clark

— Bill Casey

Marius Goring

— Commandant Anton Razinski

Naunton Wayne

— Mr. Hedgerley

Wilfrid Hyde-White

— Mr. Luke

Eugene Deckers

— Alf

Olaf Pooley

— Detective-Interrogator

Gladys Henson

— Attendant

Paul Hardtmuth

— Priest

Michael Hordern

— Lab Director Owens

George Benson

— Sandwich Stand Customer

Eric Pohlmann

— Joe - the bartender

John Horsley

— Customs Officer

Patric Doonan

— Customs Man

Joan Haythorne

— Judy

Jill Balcon

— Wardress (uncredited)

John Gabriel

— Night Field Telephone Officer (uncredited)

Hyma Beckley

— Café Mimosa Patron (uncredited)

John Boxer

— Police Sergeant at Customs Café (uncredited)

Ernest Butcher

— Tom - Lab Assistant (uncredited)

Daniel Brown

— Train Passenger (uncredited)

Robert Cawdron

— Soldier at Station Checkpoint (uncredited)

Noel Johnson

— Frank Conway (uncredited)

Anton Diffring

— Officer at Station (uncredited)

Toni Frost

— Stewardess (uncredited)

Charles Hammon

— Train Passenger in Platform Line-up (uncredited)

Philo Hauser

— Waiter (uncredited)

John G. Heller

— Soldier at Station Check Point (uncredited)

Sam Kydd

— Customs Man (uncredited)

Richard Marner

— Soldier on Train (uncredited)