A physicist finds himself drawn into an investigation to track down a spy at his research station.
3.1 / 5
Marshall Thompson
Dr. Cliff Mitchell
John Loder
Major Anderson
Henry Oscar
John Manning
John Stuart
Dr. Warren
Anne Aubrey
Jill Warren
Magda Miller
Ruth
Murray Kash
Waldo
Michael Mellinger
Tony Norwood
Robert MacKenzie
Dale
Tom Bowman
Charles
Peter Elliott
Syms
Bernard Archard
Inspector
Shirley Thieman
Shiela
Richard Gordon
Executive Producer
Ronald Kinnoch
Director
Brian Clemens
Screenplay
Producer
Albert Elms
Music
Peter Mayhew
Editor
George Frost
Makeup Artist
Doris Pollard
Hair Setup
Douglas Hermes
Production Manager
Bill Constable
Set Designer
Ernest Day
Camera Operator
John Winbolt
