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"FBI teams up with Scotland Yard to avenge murder of G-Man!"
A security leak is found at a Southern California atomic plant. The authorities stand in fear that the information leaked would go to a hostile nation. To investigate the case more efficiently, Dan O'Hara, an FBI agent, and Philip Grayson, a Scotland Yard sleuth, join forces. Will they manage to stop the spy ring from achieving their aim?
32 Cast Members
Louis Hayward
Philip 'Scotty' Grayson
Dennis O'Keefe
Daniel F. O'Hara
Louise Allbritton
Dr. Anastasia 'Toni' Neva
Carl Esmond
Dr. Ritter von Stolb
Onslow Stevens
Igor Braun
Raymond Burr
Krebs
Art Baker
Dr. Frederick Townsend
Lowell Gilmore
Dr. William Forrest
Philip Van Zandt
Anton Radchek
Charles Evans
Dr. Homer Allen
Frank Ferguson
Carl Bemish
Reed Hadley
Narrator (voice)
Ray Teal
Police Sergeant
William Tannen
FBI Chemist
Gale Storm
Voice on Tape Recorder
Arthur Space
Mr. North
Tamara Shayne
Mrs. Ecko, the Landlady
Keith Richards
FBI Agent Miller
Grandon Rhodes
Adolph Mizner
Steve Pendleton
Police Detective Gaines
