Susan North
Patricia Neal
The Stranger
Helmut Dantine
Second Police Officer
Nigel Green
Police Chief
Graham Stuart
Official
John Le Mesurier
Soldier
Peter Sallis
Arthur Walker
Derek Bond
Dr. Meinard
Cyril Luckham
Tom Harding
Willoughby Gray
Gretchen Harding
Marigold Russell
Scientist
Arthur Young
Charles Dixon
Kenneth Edwards
First Police Officer
David Garth
General
Stanley Van Beers
Editor
Peter R. Hunt
Director
Burt Balaban
Screenstory
Desmond Leslie
Producer
Gene Martel
Original Music Composer
Eric Spear
Director of Photography
Kenneth Talbot
Associate Producer
Roy Rich
Art Direction
John Elphick
Production Manager
George R. Busby
Sound
John Cape
Assistant Director
Barry Delmaine
Camera Operator
Robert Walker
Continuity
Tilly Day
Makeup Artist
Nell Taylor
Hairdresser
Barbara Ritchie
Wardrobe Supervisor
Laura Nightingale
Screenplay
Hans Jacoby