"While searching for oil in the deadly swamplands of the Florida Everglades, members of a geological expedition meet an insane doctor who is working on an experiment to create a creature that is part man and part alligator."
John Agar
as Barry Rogers
Francine York
as Pat Trent
Jeff Alexander
as Dr. Simond Trent
Shirley McLine
as Brenda Simmons
Cal Duggan
as Ritchie
Charles McLine
as Rabbit Simms
Bill McGhee
as Tracker
Bill Thurman
as Driscoll West / The Swamp Creature
Tony Huston
as Tom
Ted Mitchell
as Valjean
Roger Ready
as Frenchie
Gayle Johnson
as Mura
Michael Tolden
as Elderly Father
Annabelle Weenick
as Hotel Clerk
Patrick Cranshaw
as Pilot
J.V. Lee
as Brother
Naomi Bruton
as Marcie
Robert Dracup
Art Direction
Larry Buchanan
Director
Jack Bennett
Special Effects
Ralph K. Johnson
Director of Photography
Producer
Edwin Tobolowsky
Associate Producer
Screenplay
Joreta C. Cherry
Production Coordinator
James A. Sullivan
Unit Production Manager
Ronald Stein
Original Music Composer