
Overview
Four adventurers descend to the bottom of the sea. When their surface tether snaps, they find themselves marooned in a network of underwater caverns.
Cast: John Carradine, Robert Clarke, Phyllis Coates, Allen Windsor, Sheila Noonan, more
Director: Jerry Warren
Genres: Adventure, Science Fiction, Thriller
Cast

John Carradine
Prof. Millard Wyman

Robert Clarke
Craig Randall

Phyllis Coates
Dale Marshall
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Allen Windsor
Paul Whitmore

Sheila Noonan
Lauri Talbott

George Skaff
Dr. J.R. Matheny
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Maurice Bernard
Old Man in the Caverns
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Joe Maierhouser
Jim Wyman

Lloyd Nelson
Wilson, Sonar Man
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Harry Raven
The Captain
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Milt Collion
Hank
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Lowell Hopkins
Reporter
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Jack Haffner
Jimmy, Reporter
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Robert Carroll
Narrator
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