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When the cable breaks on their diving bell four people find themselves trapped in a hidden underwater world.
Jerry Warren
Director
John Carradine
Prof. Millard Wyman
Robert Clarke
Craig Randall
Phyllis Coates
Dale Marshall
Sheila Noonan
Lauri Talbott
George Skaff
Dr. J.R. Matheny
Lloyd Nelson
Wilson, Sonar Man