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Roddy McDowall as Eric Kardin |
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Kristine Miller as Marlina |
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Harry Lauter as Franz |
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Rand Brooks as Captain Giorg Nicholoff |
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Byron Foulger as Professor Kardin |
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Murray Alper as Nicholas |
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Marc Krah as Double Agent on Train |
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Kate Drain Lawson as Mrs. Krechow |
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Michael Vallon as Old Man on Train Station |
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Effie Laird as Scrubwoman |
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Glen Vernon as Student |
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Fred Kohler Jr. as Soldier |
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Bob Peoples as First Lieutenant (uncredited) |
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Gil Perkins as First Organizer (uncredited) |
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Fred Krone as First Student (uncredited) |
| Production | William F. Broidy | Executive Producer |
| Art | Vin Taylor | Set Dresser |
| Directing | William Beaudine Jr. | Assistant Director |
| Sound | Tom Lambert | Sound Recordist |
| Crew | Ray Mercer | Special Effects |
| Camera | John J. Martin | Camera Operator |
| Directing | Eleanor H. Donahoe | Continuity |
| Directing | Wesley Barry | Director |
| Writing | C.K. Kivari | Writer |
| Writing | Phyllis Parker | Story |
| Camera | William A. Sickner | Director of Photography |
| Editing | Ace Herman | Editor |
| Art | Dave Milton | Art Direction |
| Sound | Edward J. Kay | Original Music Composer |
| Production | Wesley Barry | Producer |
