A marine biologist and a government agent investigate mysterious deaths and rumors of a sea monster in a secluded ocean cove, and find themselves involved with a marine biology professor conducting secretive experiments, international spies trying to steal his secrets, a radioactive light on the sea bottom, and the malevolent thing which guards it.

Kent Taylor
as Dr. Ted Stevens, alias Ted Baxter

Cathy Downs
as Lois King

Michael Whalen
as Prof. King

Rodney Bell
as William S. 'Bill' Grant

Phillip Pine
as George Thomas

Vivi Janiss
as Ethel Hall

Helene Stanton
as Wanda

Pierce Lyden
as Andy, the Janitor

Michael Garth
as Sheriff

Norma Hanson
as The Phantom
CinemaSerf
I'm all for low-budget sci-fi thrillers; I used to watch them late at night as a kid. This, however, has virtually nothing to redeem it at all. Some radioactive activity down in the depths has created this devilish looking creature; and our intrepid team of scientists investigate it after bodies sta...