Man has finally conquered the ocean. America's first self-contained undersea laboratory is the pride of the nation, and expectations are high for an elaborate undersea mining operation. What wasn't expected was the inhabitants of an undiscovered world.
Bradford Dillman
as Dobler
Priscilla Barnes
as Claire
Daryl Haney
as O'Neill
Mel Ryane
as Barbara
Eb Lottimer
as Seaver
Gregory Sobeck
as Engel
Richard Young
as Chadwick
Stephen Davies
as Fernandez
John Lafayette
as Shuttle commander
Michael Adams
as Shuttle crewman
Karen Winograd
as Shuttle crewwoman
Roger Corman
as Corporate executive (uncredited)
