A physicist finds himself drawn into an investigation to track down a spy at his research station.
Verdict: Unknown
> Ronald Kinnoch (Director)
> Brian Clemens (Screenplay)> Ronald Kinnoch (Screenplay)
Marshall Thompson
John Loder
Henry Oscar
John Stuart
Anne Aubrey
Magda Miller
Murray Kash
Michael Mellinger
Robert MacKenzie
Tom Bowman
Peter Elliott
Bernard Archard
