Richard Widmark
Capt. Adam Jones
Bella Darvi
Denise Montel
Victor Francen
Prof. Montel
Cameron Mitchell
'Ski' Brodski
Gene Evans
Chief Holter
David Wayne
Tugboat Walker
Stephen Bekassy
Neuman
Richard Loo
Hakada Fujimori
Robert Adler
Welles (uncredited)
Eugene Borden
French Reporter (uncredited)
Leslie Bradley
Mr. Aylesworth (uncredited)
Henry Kulky
McCrossin (uncredited)
Peter Ortiz
Crewman (uncredited)
Ray Stevens
Crewman (uncredited)
John Wengraf
Col. Schuman (uncredited)
Harry Carter
Harry Denny
Frank Kumagai
Eddie Lee
Rollin Moriyama
Don Orlando
Beal Wong
Ben Wright
BBC Announcer (uncredited)
Ron Nyman
Lee Sockwell (uncredited)
John Roy
Crewman (uncredited)
Robert B. Williams
Reporter (uncredited)
Cactus Mack
Crewman (uncredited)
Weaver Levy
Asian Man (uncredited)
Robert Kino
Passenger (uncredited)