Credits
Cast

Walter Pidgeon
Admiral Harriman Nelson

Robert Sterling
Captain Lee Crane

Barbara Eden
Lieutenant Cathy Conners

Peter Lorre
Comm. Lucius Emery

Joan Fontaine
Dr. Susan Hiller

Michael Ansara
Dr. Miguel Alvares

Frankie Avalon
Lieutenant Chip Romano

Regis Toomey
Dr. Jamieson

John Litel
Vice Admiral B.J. Crawford

Howard McNear
Congressman Llewellyn Parker

Henry Daniell
Dr. Zucco

Robert Easton
Sparks

Charles Tannen
CPO Mack Gleason

Mark Slade
Seaman Jimmy 'Red' Smith

Del Monroe
Seaman Kowski

Jonathan Gilmore
Seaman George Young
Anthony Monaco
Cookie

Skip Ward
Crew Member
Michael Ford
Crew Member
William Herrin
Crew Member (Uncredited)
Robert Buckingham
Crew Member (Uncredited)
Richard Adams
Crew Member (Uncredited)

Jimmy Murphy
Crew Member (Uncredited)
George Diestel
Lieutenant Hodges (Uncredited)
Larry Gray
Dr. Newmar (Uncredited)

David McLean
Ned Thompson (Uncredited)
Edward Rickard
Officer (Uncredited)

Charles Dierkop
Seaview Pilot (Uncredited)

Kendrick Huxham
UN Committee Chairman (Uncredited)

Art Baker
UN Commentator (Uncredited)
Rodger Terry
Guard (Uncredited)
Brad Brown
Guard (Uncredited)
Raoul Freeman
Delegate (Uncredited)

Al Bain
Delegate (Uncredited)
Harry Baum
Delegate (Uncredited)
Benjie Bancroft
Delegate (Uncredited)
Michael Cirillo
Delegate (Uncredited)
Harry Denny
Delegate (Uncredited)
John Giovanni
Delegate (Uncredited)
Bhupesh Guha
Delegate (Uncredited)
Esther Ying Lee
Delegate (Uncredited)
Robert Locke Lorraine
Delegate (Uncredited)

George Nardelli
Delegate (Uncredited)
Paul Power
Delegate (Uncredited)
Paul Ravel
Delegate (Uncredited)

Scott Seaton
Delegate (Uncredited)
Leslie Sketchley
Delegate (Uncredited)

Ray Spiker
Delegate (Uncredited)

Hal Taggart
Delegate (Uncredited)
Robert Strong
Delegate (Uncredited)

Ron Nyman
Crew Member (uncredited)
Art
Jack Martin Smith
Art Direction
Herman A. Blumenthal
Art Direction
Walter M. Scott
Set Decoration
John Sturtevant
Set Decoration
Camera
Winton C. Hoch
Director of Photography
John Lamb
Underwater Camera
Costume & Make-Up
Paul Zastupnevich
Costume Design
Helen Turpin
Hairstylist
Ben Nye
Makeup Artist
Crew
Johnny Borgese
Special Effects
Paul Stader
Stunts
Johnny Hagner
Stunts
Zale Parry
Stunts
Fred Zendar
Technical Advisor
Jim Martell
Transportation Coordinator
Directing
Ad Schaumer
Assistant Director

Irwin Allen
Director, Screenplay, Producer, Story
Editing
George Boemler
Editor
Production
Al Gail
Producer's Assistant
Sound
Max Reese
Orchestrator
Bert Shefter
Original Music Composer
Paul Sawtell
Original Music Composer, Conductor
Alfred Bruzlin
Sound
Warren B. Delaplain
Sound
Visual Effects
L.B. Abbott
Visual Effects
Writing

Charles Bennett
Screenplay