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Michael Whalen as Robert Norton |
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Anne Nagel as Nancy Fielding |
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William Bakewell as Tom Fielding |
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Constance Worth as Linda Pavlo |
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Hans Heinrich von Twardowski as Capt. Gemmler |
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Jack Mulhall as Chief Agent James Curtis |
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George Pembroke as Prof. Karl Schmidt |
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Kenneth Harlan as Agent Brown |
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Robert Frazer as John Oliver |
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Hans von Morhart as Heinrich |
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Michael Vallon as Argus |
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Willy Castello as Otto |
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C. Montague Shaw as Franklin Prescott (uncredited) |
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Poppy Wilde as Restaurant Patron (uncredited) |
| Directing | Albert Herman | Director |
| Writing | Arthur St. Claire | Story |
| Camera | Edward Linden | Director of Photography |
| Writing | Arthur St. Claire | Screenplay |
