The most fantastic undersea odyssey ever filmed.

When an underwater ocean lab is lost in a earthquake, an advanced submarine is sent down to find it and encounters terrible danger.

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Main Cast: Ben Gazzara, Walter Pidgeon, Ernest Borgnine, Yvette Mimieux, Donnelly Rhodes, Chris Wiggins, Mark Walker, Leslie Carlson, Stuart Gillard, Michael J. Reynolds

Director: Daniel Petrie

Writer: Jack DeWitt

Editor:

Cinematographer: Harry Makin

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