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.
Directed by
Eugène Lourié, Douglas Hickox
Gene Evans
Steve Karnes
André Morell
Prof. James Bickford
Derren Nesbitt
The Radar Operator, at the radar room (uncredited)
Lloyd Lamble
Senior Admiral, at the Admiralty
Max Faulkner
PLA Radio Operator (uncredited)
Patrick Jordan
Photo Lab Aide
Jack MacGowran
Dr. Sampson, the paleontologist
Howard Lang
Naval Commader, at the "Valkyrie" wreck (uncredited)