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Alan Ladd as John Martin / Lt. (j.g.) Philip Masson, U.S.N.R. / Philippe Martine |
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Geraldine Fitzgerald as Miss Ellen Rogers / Madame Elaine Duprez |
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Patric Knowles as Cmdr. Brady |
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John Hoyt as Col. Paul Meister |
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Gloria Saunders as (W)omen's (A)rmy (C)orps Radio Operator Mary |
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Richard Webb as Frank Schmidt (O)perational (S)upport (P)ackages, (M)aterial, Maintenance, Management, U.S.N.R. / Parker |
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Richard Benedict as Robert Bouchet, Tech Sgt., A.U.S. / Albert Bernardi |
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Harold Vermilyea as Amadeus Brink |
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Don Beddoe as Rodney "Gates" Parrish / Raoul Josse |
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Onslow Stevens as Field |
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Gavin Muir as Col. Crawson |
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Egon Brecher as Marcel Aubert |
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Joseph Crehan as Gen. Donovan |
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Bobby Driscoll as Gerard |
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Julia Dean as Madame Prideaux |
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Crane Whitley as Arnheim |
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Dorothy Adams as Claudette (uncredited) |
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John Dehner as German Radar Captain (uncredited) |
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Frank Ferguson as Electronics Engineer (uncredited) |
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Leo Schlesinger as German Soldier (uncredited) |
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Carl R. Botefuhr as American Soldier (uncredited) |
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George Bruggeman as MP NCO (uncredited) |
| Sound | Daniele Amfitheatrof | Music |
| Production | Richard Maibaum | Producer |
| Writing | Robert Thoeren | Screenplay |
| Directing | Irving Pichel | Director |
| Camera | Lionel Lindon | Director of Photography |
| Sound | Heinz Roemheld | Music |
| Editing | William Shea | Editor |
| Sound | John Cope | Sound Recordist |
| Sound | Harold Lewis | Sound Recordist |
| Art | Haldane Douglas | Art Direction |
| Directing | John Francis Murphy | Assistant Director |
| Art | Stanley J. Sawley | Set Decoration |
| Art | Hans Dreier | Art Direction |
| Costume & Make-Up | Mary Kay Dodson | Costume Design |
| Art | Sam Comer | Set Decoration |
| Costume & Make-Up | Wally Westmore | Makeup Supervisor |
