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
