Strange goings on at the site of an experimental underwater laboratory as a mysterious object of unknown origin is detected in the area...

Director: Francis D. Lyon

Cast: Scott Brady, Sheree North, Gary Merrill, Wende Wagner, Mike Road, John Howard, William Thourlby, Biff Elliot, Glenn Sipes, Richard Niles, Roy Barcroft, Ed Charles Sweeny, Ken Delo, Ron Burke, James Hong