Richard Widmark character Capt. Adam Jones
Bella Darvi character Denise Montel
Victor Francen character Prof. Montel
Cameron Mitchell character 'Ski' Brodski
Gene Evans character Chief Holter
David Wayne character Tugboat Walker
Stephen Bekassy character Neuman
Richard Loo character Hakada Fujimori
Henry Kulky character McCrossin (uncredited)
Ray Stevens character Crewman (uncredited)
Leslie Bradley character Mr. Aylesworth (uncredited)
Robert Adler character Welles (uncredited)
Eugene Borden character French Reporter (uncredited)
John Wengraf character Col. Schuman (uncredited)
Ben Wright character BBC Announcer (uncredited)
