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Directed by | |||
| Jerry Warren | |||
Writing credits | ||
| John W. Steiner | ||
| John Carradine | ... | Prof. Millard Wyman | |
| Robert Clarke | ... | Craig Randall | |
| Phyllis Coates | ... | Dale Marshall | |
| Allen Windsor | ... | Paul Whitmore | |
| Sheila Noonan | ... | Lauri Talbott | |
| George Skaff | ... | Dr. J.R. Matheny | |
| Maurice Bernard | ... | Old Man in the Caverns | |
| Joe Maierhouser | ... | Jim Wyman | |
| Lloyd Nelson | ... | Wilson, Sonar Man | |
| Harry Raven | ... | The Captain | |
| Milt Collion | ... | Hank | |
| Robert Carroll | ... | Narrator | |
| Lowell Hopkins | ... | Reporter | |
| Jack Haffner | ... | Jimmy, Reporter | |
| rest of cast listed alphabetically: | |||
| Jerry Warren | ... | Plane Passenger Behind Wyman (uncredited) | |
Produced by | |||
| Jerry Warren | .... | producer | |
Cinematography by | |||
| Victor Fisher | |||
Film Editing by | |||
| Harold V. McKenzie | |||
| James 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 | |
Music Department | |||
| Josef Zimanich | .... | musical director | |
Other crew | |||
| Raymond Guth | .... | set supervisor (as Ray Guth) | |
| Brianne Murphy | .... | dialogue director (as Bri Murphy) | |
| Company credits | Technical specifications | Main details |