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.
as Captain Phillip Laidlaw
as Joyce Collins
as McBride
as Snyder
as Scarpelli
as Jim Richardson
as Dr. Diane Norris
as John Van Gelder
as Burciaga
as Hodges
as Osborne
as (uncredited)
