A human scientist capable of living underwater discovers similar alien life inhabiting human bodies, and looks to them for a clue to his origin.
Patrick Duffy
Mark Harris
Belinda Montgomery
Dr. Elizabeth Merrill
Kenneth Tigar
Dr. Miller Simon
Alan Fudge
C.W. Crawford
Tiffany Bolling
Lioa / Dilly
Annette Charles
Ginny Mendoza
Burr DeBenning
Xos / Chazz
Stanley Bennett Clay
Boy
Alan Mandell
Grant Stockwood
Hank Stohl
Sub Captain Wes
Russell Arms
Medical Examiner
Arch Archambault
Second Officer
Michael J. London
Air Lock Man
Vince Deadrick Sr.
Herb Wayland
Maurice Hill
Lou
Joel Lawrence
Hot Tub Manager
Maralyn Thoma
Myrtle
Dick Winslow
Fish Store Clerk
Marc Daniels
Director
Robert Lewin
Writer
Mayo Simon
Creator
Herbert F. Solow
Robert H. Justman
Supervising Producer
Producer
Executive Producer
Fred Karlin
Music
Héctor R. Figueroa
Director of Photography
John Farrell
Editor
Gary Griffin
Morris Chapnick
Casting Director
Tracy Bousman
Art Direction
Solomon Brewer
Set Decoration
Charles Pierce
Fred B. Phillips
Makeup Artist
Bruce Hanson
Assistant Director
Wes McAfee
Steve Siporin
Second Assistant Director
Robert M. Anderson
Property Master
Bob McLing
