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Constance Bennett as Frances Hawtree / Z-1 |
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Erich von Stroheim as Valdar / Schiller / Blecher |
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Anthony Bushell as Capt. Arthur Chamberlain |
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William Courtenay as Mr. Yates |
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Crauford Kent as General Hewlett |
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Charlotte Walker as Lady Catherine Chamberlain |
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William Holden as Sir Winston Chamberlain |
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Paul Panzer as 'Kirsch' the Decoy (uncredited) |
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Wilhelm von Brincken as Capt. Kugler (uncredited) |
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Ullrich Haupt as German Colonel (uncredited) |
| Directing | Roy Del Ruth | Director |
| Writing | Anthony Paul Kelly | Theatre Play |
| Writing | Oliver H.P. Garrett | Screenplay |
| Writing | Arthur Caesar | Screenplay |
| Costume & Make-Up | Earl Luick | Costume Design |
| Editing | William Holmes | Editor |
| Production | Darryl F. Zanuck | Producer |
| Camera | Barney McGill | Director of Photography |
| Sound | Harry D. Mills | Sound Recordist |
| Writing | Arthur Caesar | Dialogue |
| Writing | Oliver H.P. Garrett | Dialogue |
| Sound | Paul Lamkoff | Original Music Composer |
| Sound | Louis Silvers | Conductor |
