Where to Watch
Region
Apple TV Store
Rent from
HD
$3.99
Apple TV Store
Buy from
HD
$14.99
MGM Plus Roku Premium Channel
Stream included
HD
Included
MGM+ Amazon Channel
Stream included
HD
Included
fuboTV
Stream included
HD
Included
See all 11 options →
Prices last updated September 1, 2026. Pricing and availability may vary by region.
powered by JustWatch
About
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.
Theatrical
Jul 28, 1954
Directors
Producer
Studio
Gibraltar Films Ltd., Gibraltar Productions, United Artists
Keywords
Cast
Full credits →D
Dennis O'Keefe
Joe Dennison
M
Margaret Sheridan
Marline Miller
P
Philip Friend
Insp. McClaren
A
Alan Wheatley
Thompson Blake
F
Francis de Wolff
Yeo
E
Eric Berry
Hunziger
G
Gudrun Ure
Sgt. Smith
S
Seymour Green
Lascelles
P
Paul Hardtmuth
Dr. Eric Miller
C
Colin Tapley
Sir Stafford Beach
M
Michael Balfour
Hoxie
C
Cyril Chamberlain
Castle
P
Paul Carpenter
Mickey Sweeney (uncredited)
