Alan Ladd
John Martin / Lt. (j.g.) Philip Masson, U.S.N.R. / Philippe Martine
Geraldine Fitzgerald
Miss Ellen Rogers / Madame Elaine Duprez
Patric Knowles
Cmdr. Brady
John Hoyt
Col. Paul Meister
Gloria Saunders
(W)omen's (A)rmy (C)orps Radio Operator Mary
Richard Webb
Frank Schmidt (O)perational (S)upport (P)ackages, (M)aterial, Maintenance, Management, U.S.N.R. / Parker
Richard Benedict
Robert Bouchet, Tech Sgt., A.U.S. / Albert Bernardi
Harold Vermilyea
Amadeus Brink
Don Beddoe
Rodney "Gates" Parrish / Raoul Josse
Onslow Stevens
Field
Gavin Muir
Col. Crawson
Egon Brecher
Marcel Aubert
Joseph Crehan
Gen. Donovan
Bobby Driscoll
Gerard
Julia Dean
Madame Prideaux
Crane Whitley
Arnheim
Dorothy Adams
Claudette (uncredited)
John Dehner
German Radar Captain (uncredited)
Frank Ferguson
Electronics Engineer (uncredited)
Leo Schlesinger
German Soldier (uncredited)
Carl R. Botefuhr
American Soldier (uncredited)
George Bruggeman
MP NCO (uncredited)