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: Douglas Hickox & Eugène Lourié
Written by: Eugène Lourié & Daniel James
Runtime: 80 minutes
Critics score:
Tagline: The biggest thing since creation!
Cast:
Gene Evans Gene Evans
Steve Karnes 
André Morell André Morell
Prof. James Bickford 
Leigh Madison Leigh Madison
Jean Trevethan 
John Turner John Turner
John 
Alastair Hunter Alastair Hunter
Dr. C. A. Morris, the village doctor 
Lloyd Lamble Lloyd Lamble
Senior Admiral, at the Admiralty 
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Also known as:
  • The Giant Behemoth