A physicist finds himself drawn into an investigation to track down a spy at his research station.
Director
Ronald Kinnoch
Marshall Thompson
Dr. Cliff Mitchell
John Loder
Major Anderson
Henry Oscar
John Manning
John Stuart
Dr. Warren
Anne Aubrey
Jill Warren
Magda Miller
Ruth
Michael Mellinger
Tony Norwood
Tom Bowman
Charles
Bernard Archard
Inspector
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