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The crew of an experimental underwater nuclear base are forced to struggle for their lives when their explorations disturb a creature who threatens to destroy their base.
Character :Captain Phillip Laidlaw
Character :Joyce Collins
Character :McBride
Character :Snyder
Character :Scarpelli
Character :Jim Richardson
Character :Dr. Diane Norris
Character :John Van Gelder
Character :Burciaga
Character :Hodges
Character :Osborne
Character :(uncredited)
