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Noah Beery as Capt. John Holling |
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Astrid Allwyn as Lila Kane |
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Edwin Maxwell as Major Pope |
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Gustav von Seyffertitz as Inspector Von Kessling |
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Ralph Lewis as Prof. Grimson |
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Cornelius Keefe as First Officer Cliff Rogers |
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Zeffie Tilbury as Granny Plimpton |
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Boothe Howard as Capt. Downey |
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Howard Hickman as Dr. Howard |
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Jerry Stewart as Edgar Morton |
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John M. Sullivan as Watson |
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George 'Gabby' Hayes as Joe, the Watchman |
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George Cleveland as Simms, the Steward |
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Raymond Brown as Spy Chief (uncredited) |
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Gordon De Main as Commander Bryson (uncredited) |
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Olaf Hytten as Grimson's Aide (uncredited) |
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George Nash as Waiter (uncredited) |
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Harry Schultz as Aide (uncredited) |
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Slim Whitaker as Crewman (uncredited) |
| Directing | William Nigh | Director |
| Production | Paul Malvern | Producer |
| Writing | Edgar Wallace | Novel |
| Writing | Wellyn Totman | Screenplay |
| Camera | Archie Stout | Director of Photography |
| Sound | Oliver Wallace | Original Music Composer |
