Maj. Alec White
Jack Warner
Insp. Michael Kenyon
Nigel Patrick
Sub-Director Holt
Martin Boddey
Baggage Room Clerk
Hal Osmond
Det. Pierre Valance
Jacques Brunius
Mr. Bennett
Ronald Adam
Michael's Dance Partner (uncredited)
Jill Adams
Customs Officer (uncredited)
John Arnatt
Cooper
Ballard Berkeley
Little Frenchman
Jacques Cey
Customs Officer
Cyril Chamberlain
A.P.O.
Philip Dale
Rita Compton
Elizabeth Sellars
(uncredited)
David Davies
Head Waiter (uncredited)
Guy De Monceau
French Customs Officer
Arnold Diamond
Montana Hotel Receptionist
Tom Gill
Luigi
Campbell Gray
Police Driver (uncredited)
George Hilsdon
John Horsley
Robin Hunter
Seaman
Douglas Ives
Cop at London Airport
Hamilton Keene
Roger Compton
Terence Morgan
Captain of Python
Lloyd Lamble
A.P.O. at Customs Launch
Terence Longdon
Royal Navy Information Officer
Nicholas Phipps
Ship's Cook
Denis Shaw
Sergeant Dodson, River Police
Campbell Singer
John Singer
Seaburyness Police Sergeant
Philip Stainton
Old Man in Dungarees
Herbert C. Walton
Smuggler at Airfield
Brian Wilde
W.S.O.
Joan Winmill Brown
Mme. Simonetta
Greta Gynt
Max
Theodore Bikel
Steven Lasovich
Eric Pohlmann
Lady Flavia Queensway
Joyce Grenfell
Director of Customs
Michael Hordern
Agent Larkins
James Gilbert
Editor
Anne V. Coates
Director
Harold French
Screenplay
Sydney Box
Producer