While in London trying to nab several fugitives who stole a million dollars from a U.S. Treasury vault, American federal agent Dennison (Dennis O'Keefe) assists Scotland Yard Insp. McClaren (Philip Friend) in his search for a missing atomic scientist (Paul Hardtmuth). The detective duo discovers that the key to solving both cases may rest with the scientist's daughter (Margaret Sheridan) and her fascinating diamond.

Directed by: Dennis O'Keefe & Montgomery Tully
Written by: John C. Higgins
Runtime: 83 minutes
Tagline: 3000 Miles Of Desperate Man-Hunt!
Cast:
Dennis O'Keefe Dennis O'Keefe
Joe Dennison 
Margaret Sheridan Margaret Sheridan
Marline Miller 
Philip Friend Philip Friend
Insp. McClaren 
Alan Wheatley Alan Wheatley
Thompson Blake 
Eric Berry Eric Berry
Hunziger 
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