Summary: Four adventurers descend to the depths of the ocean when the cable on their underwater diving bell snaps. The rest of their expedition, believing them to be lost, abandons hope of finding them. Exiting the diving bell, the party finds themselves in a network of underwater caverns... (imdb)

Poster submitted by Gauntlet

Genres: Sci-fi, Adventure

Country: USA

Directed By: Jerry Warren

Written By: John W. Steiner

Starring: John Carradine, Robert Clarke, Phyllis Coates, Allen Windsor, Sheila Noonan, George Skaff

More information at the Internet Movie Database