Steve Karnes

Prof. James Bickford

Jean Trevethan

John

Dr. C. A. Morris, the village doctor

Senior Admiral, at the Admiralty

Dr. Sampson, the paleontologist

Mini Submarine Officer

Tom Trevethan

Photo Lab Aide

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

Dialogue Scientist at Conference (bit)

Scientist at Conference (uncredited)

TV Newscaster (uncredited)

Man Listening to Car Radio (uncredited)

PLA Radio Operator (uncredited)

Dr. Sampson's Helicopter Pilot (uncredited)

French Radio Officer (uncredited)

The Radar Operator, at the radar room (uncredited)

Naval Officer in Situation Room (uncredited)