After a nuclear attack, an unlikely group of survivors, including a geologist, a crook and his moll, and a prospector, find temporary shelter in the remote-valley home of a survivalist and his beautiful daughter, but soon have to deal with the spread of radioactivity - and its effects on animal life, including humans.

Directed by: Roger Corman
Written by: Lou Rusoff
Runtime: 79 minutes
Tagline: ATTACKED... by a creature from hell!
Cast:
Lori Nelson Lori Nelson
Louise Madison 
Paul Birch Paul Birch
Jim Madison 
Mike Connors Mike Connors
Tony Lamont 
Adele Jergens Adele Jergens
Ruby 
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Also known as:
  • Το Τέρας της Μαύρης Κοιλάδος
  • Instinct de Survie