Steve Karnes

Gene Evans

Acting

Prof. James Bickford

André Morell

Acting

Jean Trevethan

Leigh Madison

Acting

John

John Turner

Acting

Dr. C. A. Morris, the village doctor

Alastair Hunter

Acting

Senior Admiral, at the Admiralty

Lloyd Lamble

Acting

Dr. Sampson, the paleontologist

Jack MacGowran

Acting

Mini Submarine Officer

Maurice Kaufmann

Acting

Tom Trevethan

Henri Vidon

Acting

Photo Lab Aide

Patrick Jordan

Acting

Naval Commader, at the "Valkyrie" wreck (uncredited)

Howard Lang

Acting

Dialogue Scientist at Conference (bit)

Leonard Sachs

Acting

Scientist at Conference (uncredited)

Ernest Blyth

Acting

TV Newscaster (uncredited)

Neal Arden

Acting

Man Listening to Car Radio (uncredited)

Paul Beradi

Acting

PLA Radio Operator (uncredited)

Max Faulkner

Acting

Dr. Sampson's Helicopter Pilot (uncredited)

Neil Hallett

Acting

French Radio Officer (uncredited)

André Maranne

Acting

The Radar Operator, at the radar room (uncredited)

Derren Nesbitt

Acting

Naval Officer in Situation Room (uncredited)

Guy Standeven

Acting