Full Credits
20 members

Gene Evans
Steve Karnes

André Morell
Prof. James Bickford

Leigh Madison
Jean Trevethan

John Turner
John

Alastair Hunter
Dr. C. A. Morris, the village doctor

Lloyd Lamble
Senior Admiral, at the Admiralty

Jack MacGowran
Dr. Sampson, the paleontologist

Maurice Kaufmann
Mini Submarine Officer
Henri Vidon
Tom Trevethan

Patrick Jordan
Photo Lab Aide
Howard Lang
Naval Commader, at the "Valkyrie" wreck (uncredited)

Leonard Sachs
Dialogue Scientist at Conference (bit)
Ernest Blyth
Scientist at Conference (uncredited)
Neal Arden
TV Newscaster (uncredited)
Paul Beradi
Man Listening to Car Radio (uncredited)

Max Faulkner
PLA Radio Operator (uncredited)

Neil Hallett
Dr. Sampson's Helicopter Pilot (uncredited)

André Maranne
French Radio Officer (uncredited)

Derren Nesbitt
The Radar Operator, at the radar room (uncredited)

Guy Standeven
Naval Officer in Situation Room (uncredited)
29 members
Eugène Lourié
Director
Kim Mills
First Assistant Director
Jennifer Herrinshaw
Continuity
Douglas Hickox
Director
Eugène Lourié
Screenplay
Robert Abel
Story
Alan J. Adler
Story
Daniel James
Screenplay
David Diamond
Producer
Ted Lloyd
Producer
Jacques de Lane Lea
Production Manager
Ken Hodges
Director of Photography
Desmond Davis
Camera Operator
Edwin Astley
Original Music Composer
Richard Marden
Sound Editor
Sid Wiles
Sound
Edwin Astley
Conductor
Eugène Lourié
Production Design
Harry White
Art Direction
Bernadette Ibbetson
Hairstylist
Jimmy Evans
Makeup Artist
Freda Gibson
Wardrobe Master
Willis H. O'Brien
Visual Effects
Lee Doig
Editor
Irving Block
Special Effects
Louis DeWitt
Special Effects
Willis H. O'Brien
Special Effects
Pete Peterson
Special Effects
Jack Rabin
Special Effects