Jack Warner

Character: Maj. Alec White

Nigel Patrick

Character: Insp. Michael Kenyon

Elizabeth Sellars

Character: Rita Compton

Terence Morgan

Character: Roger Compton

Greta Gynt

Character: Mme. Simonetta

Theodore Bikel

Character: Max

Eric Pohlmann

Character: Steven Lasovich

Joyce Grenfell

Character: Lady Flavia Queensway

Michael Hordern

Character: Director of Customs

James Gilbert

Character: Agent Larkins

Martin Boddey

Character: Sub-Director Holt

Hal Osmond

Character: Baggage Room Clerk

Jacques Brunius

Character: Det. Pierre Valance

Ronald Adam

Character: Mr. Bennett

Jill Adams

Character: Michael's Dance Partner (uncredited)

John Arnatt

Character: Customs Officer (uncredited)

Ballard Berkeley

Character: Cooper

Jacques Cey

Character: Little Frenchman

Cyril Chamberlain

Character: Customs Officer

Philip Dale

Character: A.P.O.

David Davies

Character: (uncredited)

Guy De Monceau

Character: Head Waiter (uncredited)

Arnold Diamond

Character: French Customs Officer

Tom Gill

Character: Montana Hotel Receptionist

Campbell Gray

Character: Luigi

George Hilsdon

Character: Police Driver (uncredited)

John Horsley

Character: Customs Officer

Robin Hunter

Character: A.P.O.

Douglas Ives

Character: Seaman

Hamilton Keene

Character: Cop at London Airport

Lloyd Lamble

Character: Captain of Python

Terence Longdon

Character: A.P.O. at Customs Launch

Nicholas Phipps

Character: Royal Navy Information Officer

Denis Shaw

Character: Ship's Cook

Campbell Singer

Character: Sergeant Dodson, River Police

John Singer

Character: Seaman

Philip Stainton

Character: Seaburyness Police Sergeant

Herbert C. Walton

Character: Old Man in Dungarees

Brian Wilde

Character: Smuggler at Airfield

Joan Winmill Brown

Character: W.S.O.