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)
