

02/09/1948
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?

Louis Hayward
as Philip 'Scotty' Grayson

Dennis O'Keefe
as Daniel F. O'Hara

Louise Allbritton
as Dr. Anastasia 'Toni' Neva

Carl Esmond
as Dr. Ritter von Stolb

Onslow Stevens
as Igor Braun

Raymond Burr
as Krebs

Art Baker
as Dr. Frederick Townsend

Lowell Gilmore
as Dr. William Forrest

Philip Van Zandt
as Anton Radchek

Charles Evans
as Dr. Homer Allen

Frank Ferguson
as Carl Bemish

Reed Hadley
as Narrator (voice)

Ray Teal
as Police Sergeant

William Tannen
as FBI Chemist

Gale Storm
as Voice on Tape Recorder

Arthur Space
as Mr. North

Tamara Shayne
as Mrs. Ecko, the Landlady

Keith Richards
as FBI Agent Miller

Grandon Rhodes
as Adolph Mizner

Steve Pendleton
as Police Detective Gaines

Howard Negley
as Feodore

Jimmy Lloyd
as FBI Agent Alison

Myron Healey
as FBI Agent Thompson

John Hamilton
as G.W. Hunter

Paul Bryar
as

Fred Coby
as

Bert Davidson
as

Marten Lamont
as

Lee Phelps
as

Suzanne Ridgway
as

Arthur Tovey
as

Crane Whitley
as
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