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
Derren Nesbitt
The Radar Operator, at the radar room (uncredited)
Gene Evans
Steve Karnes
André Morell
Prof. James Bickford
Jack MacGowran
Dr. Sampson, the paleontologist
John Turner
John
Lloyd Lamble
Senior Admiral, at the Admiralty
Maurice Kaufmann
Mini Submarine Officer
Guy Standeven
Naval Officer in Situation Room (uncredited)
Howard Lang
Naval Commader, at the "Valkyrie" wreck (uncredited)