Credits

John Agar

Prof. Clete Ferguson

Lori Nelson

Helen Dobson

John Bromfield

Joe Hayes

Nestor Paiva

Captain Lucas

Grandon Rhodes

Jackson Foster

Dave Willock

Lou Gibson

Robert B. Williams

George Johnson

Charles Cane

Police Captain

Loretta Agar

Woman on Boat (uncredited)

Bill Baldwin

Patrol Boat Dispatcher (voice / uncredited)

Jere Beery

Photographer (uncredited)

Ricou Browning

The Gill Man (in water) / Lab Technician (uncredited)

Diane DeLaire

Miss Abbott (uncredited)

Mike Doyle

Cop (uncredited)

Clint Eastwood

Jennings (uncredited)

Jack Gargan

Skipper (uncredited)

Charles Gibb

Cop (uncredited)

Brett Halsey

Pete (uncredited)

Don C. Harvey

Mac - Spotlight Party Leader (uncredited)

Tom Hennesy

The Gill Man (on land) / Marineland Diver (uncredited)

Don House

Diver (uncredited)

Robert F. Hoy

Charlie (uncredited)

Ned Le Fevre

Newscaster (uncredited)

Sydney Mason

Police Announcer (uncredited)

Robert Nelson

Dr. McCuller (uncredited)

Patricia Powers

Girl in Convertible

Bert Stevens

Search Party Member (uncredited)

Charles Victor

Policeman (uncredited)

Robert Wehling

Joe (uncredited)

James R. Wolfe

Man at Tank (uncredited)

Alexander Golitzen

Art Direction

Alfred Sweeney

Art Direction

Russell A. Gausman

Set Decoration

Julia Heron

Set Decoration

Scotty Welbourne

Director of Photography

Jay A. Morley Jr.

Costume Designer

Joan St. Oegger

Hairstylist

Bud Westmore

Makeup Artist

Robert F. Hoy

Stunts

Don House

Stunts

Tom Hennesy

Stunts

Ginger Stanley

Stunts

Fred Frank

Assistant Director

Jack Arnold

Director

Paul Weatherwax

Editor

Edward Dodds

Unit Production Manager

Henry Mancini

Music

Frank Skinner

Music

Hans J. Salter

Music

Milton Rosen

Music

Joseph Gershenson

Music Supervisor

Ethmer Roten

Musician

William Lava

Original Music Composer

Herman Stein

Original Music Composer

Leslie I. Carey

Sound

Jack A. Bolger, Jr.

Sound

Ben Hendricks

Sound Editor

Albert E. Kennedy

Sound Editor

Jack Kevan

Creature Design

Martin Berkeley

Screenplay

William Alland

Story, Producer