
Scientists surgically transform the Creature into an air-breather, but being able to live on land is not enough to make him comfortable with humans. Enraged, he turns his wrath on anyone who comes near as he desperately tries to return to the deep-water world where he truly belongs.
Cast

Rex Reason
Dr. Thomas Morgan

Jeff Morrow
Dr. William Barton

Leigh Snowden
Marcia Barton

Gregg Palmer
Jed Grant

Maurice Manson
Dr. Borg

James Rawley
Dr. Johnson

David McMahon
Capt. Stanley

Paul Fierro
Morteno

Lillian Molieri
Mrs. Morteno

Frank Chase
Steward
Larry Hudson
State Trooper

Ricou Browning
The Gill Man (in water)(uncredited)

Don Megowan
The Gill Man (on land)(uncredited)

George Sowards
Ranch Hand (uncredited)
Crew
John Sherwood
Director
Arthur A. Ross
Screenplay, Story
Edward Curtiss
Editor
Maury Gertsman
Director of Photography

William Alland
Producer
Eddie Pyle
Camera Operator
Lew Swartz
Assistant Camera
Clifford Stine
Visual Effects Camera, Visual Effects
Jay A. Morley Jr.
Costume Design
Roger J. Weinberg
Costume Design
Joan St. Oegger
Hairstylist
Vincent Romaine
Makeup Artist

Bud Westmore
Makeup Supervisor
Jack Kevan
Makeup Effects Designer
Peter Berkos
Sound Editor
Robert L. Bratton
Sound Editor
George Hoagland
Sound Editor
Leslie I. Carey
Sound
Robert Pritchard
Sound
Irving Gertz
Original Music Composer

Henry Mancini
Original Music Composer

Heinz Roemheld
Original Music Composer
John P. Austin
Set Decoration
Russell A. Gausman
Set Decoration
Julius Rosenkrantz
Props
Alexander Golitzen
Art Direction
Robert Emmet Smith
Art Direction
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