Directed by
| Jerry Warren | ||
Writing Credits
| John W. Steiner | ... | (original screenplay) |
Cast (in credits order) verified as complete
| John Carradine | ... | Prof. Millard Wyman | |
| Robert Clarke | ... | Craig Randall | |
| Phyllis Coates | ... | Dale Marshall | |
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Allen Windsor | ... | Paul Whitmore |
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Sheila Noonan | ... | Lauri Talbott |
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George Skaff | ... | Dr. J.R. Matheny |
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Maurice Bernard | ... | Ingol - Old Man in the Caverns |
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Joe Maierhauser | ... | Jim Wyman |
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Harry Raven | ... | The Captain |
| Lloyd Nelson | ... | Wilson - Sonar Man | |
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Jack Haffner | ... | Jimmy - Reporter |
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Milt Collion | ... | Hank |
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Robert Carroll | ... | Narrator (voice) |
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Lowell Hopkins | ... | Reporter |
| Rest of cast listed alphabetically: | |||
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Jerry Warren | ... | Plane Passenger Behind Wyman (uncredited) |
Produced by
| Jerry Warren | ... | producer |
Cinematography by
| Victor Fisher | ... | director of photography |
Editing by
| Harold V. McKenzie | ||
| James Sweeney | ... | (as James R. Sweeney) |
Art Direction by
| Marvin Herbert | ||
Production Management
| Brianne Murphy | ... | production supervisor (as G.B. Murphy) |
| Lloyd Nelson | ... | unit manager |
Second Unit Director or Assistant Director
| Martin Harbor | ... | assistant director (uncredited) |
Camera and Electrical Department
| Mel Fisher | ... | underwater photographer |
| Brydon Baker | ... | additional photographer (uncredited) |
Music Department
| Josef Zimanich | ... | musical director |
| Geordie Hormel | ... | composer: stock music (uncredited) |
| William Loose | ... | composer: stock music (uncredited) |
| Spencer Moore | ... | composer: stock music (uncredited) |
| John Seely | ... | music coordinator (uncredited) |
Additional Crew
| Raymond Guth | ... | set supervisor (as Ray Guth) |
| Brianne Murphy | ... | dialogue director (as Bri Murphy) |
| Jerry Warren | ... | presenter |