Of Unknown Origin – Canada/USA, 1983

of unknown origin poster

‘If it can’t scare them to death it will find another way.’

Of Unknown Origin is a 1983 Canadian-American horror film directed by George P. Cosmatos and starring Peter Weller and Shannon Tweed. It was written by Brian Taggert and based on the novel The Visitor by Chauncey G. Parker III.


Mild-mannered everyman Bart Hughes (Peter Weller) has a seemingly content bourgeois life in New York City. When his wife and child leave for a vacation, Bart stays behind to work on a project that should get him a promotion.

However, some sort of large rodent in his basement starts to bother him and consumes his time. Bart becomes obsessed with it and eventually starts losing his mind while trying to kill the creature, destroying most of his house in the process…

of unknown origin

Of Unknown Origin is released on Blu-ray by Scream Factory on May 22, 2018.

Buy Blu-ray: Amazon.com

  • 2K Scan From The Inter-positive
  • The Origins Of Unknown Origin – An Interview With Executive Producer Pierre David
  • That Rat Movie – An Interview With Writer Brian Taggert
  • Hey, Weren’t You In Scanners? – An Interview With Actor Louis Del Grande
  • Audio Commentary With Director George P. Cosmatos And Actor Peter Weller
  • Theatrical Trailers
  • Still Gallery


“Filmed with Phase IV-style macroscopic photography and hideous attention to detail, Of Unknown Origin dashes headlong into the claustrophobic, nasty little world of vermin.” Sean Gill, Junta Juleil’s Culture Shock

Of Unknown Origin is one of the best giant rat movies ever made. Weller is the king of this castle and no giant rat is going to tell him otherwise. The Rat Battle Royale is on.” Dr Gore’s Movie Reviews

of unknown origin

“What makes Of Unknown Origin so great is that director George P. (Rambo) Cosmatos really gets inside the main character’s psyche and makes the cat and mouse… err, rat games personal. I mean imagine if Roman Polanski had directed Willard; that will give you some idea of what to expect from this movie.”Mitch Lovell, The Video Vacuum

of unknown origin dvd

Buy DVD: Amazon.com

Filming locations:

Montreal, Quebec but set in New York City.

Wikipedia IMDb | Related: Attack of the Rats! – Article by David Flint


Categories: 1980s, adaptation of a novel, Blu-ray, Canadian, creature feature, nature-strikes-back

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