Cast
Derek Bond
Arthur Walker
Cyril Luckham
Dr. Meinard
Nigel Green
Second Police Officer
Peter Sallis
Soldier (uncredited)
Patricia Neal
Susan North
Helmut Dantine
The Stranger
Kenneth Edwards
Charles Dixon
Stanley Van Beers
General
Jack Gwillim
Representative of Parliament (uncredited)
John Le Mesurier
Official/Man at Desk (uncredited)
Hugh Moxey
Secretary of the Interior (uncredited)
Willoughby Gray
Tom Harding
Arthur Young
Scientist