Marine atomic tests cause changes in the ocean's ecosystem resulting in dangerous blobs of radiation and the resurrection of a dormant dinosaur which threatens London.
as Steve Karnes
as Prof. James Bickford
as Jean Trevethan
as John
as Dr. C. A. Morris, the village doctor
as Senior Admiral, at the Admiralty
as Dr. Sampson, the paleontologist
as Mini Submarine Officer
as Tom Trevethan
as Photo Lab Aide
as Naval Commader, at the "Valkyrie" wreck (uncredited)
as Dialogue Scientist at Conference (bit)
as Scientist at Conference (uncredited)
as TV Newscaster (uncredited)
as Man Listening to Car Radio (uncredited)
as PLA Radio Operator (uncredited)
as Dr. Sampson's Helicopter Pilot (uncredited)
as French Radio Officer (uncredited)
as The Radar Operator, at the radar room (uncredited)
as Naval Officer in Situation Room (uncredited)
