A futuristic underwater sea-lab is having problems with a UFO that's parked between them and a nearby deep ocean trench. As they investigate, they attract the unwanted attention of a dangerous creature who puts the scientists and crew in danger.

Directed by: Francis D. Lyon
Written by: Arthur C. Pierce
Runtime: 83 minutes
Tagline: TERROR from the DEPTHS of the SEA!
Cast:
Scott Brady Scott Brady
Commander Wayne 
Sheree North Sheree North
Dr. Rene Peron 
Gary Merrill Gary Merrill
Dr. LaSatier 
John Howard John Howard
Dr. James 
Wende Wagner Wende Wagner
Sandra Welles 
Mike Road Mike Road
Hugh Maddox 
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Also known as:
  • L'Invasione - Marte Attacca La Terra
  • Terror of the Deep