Of Unknown Origin
“Two forces have claimed the house. Only one will survive.”
A man who recently completed rebuilding a townhouse becomes obsessed with a rat infestation until it becomes an interspecies duel.
Where to watch Of Unknown Origin in United States
Amazon Video
Apple TV Store
Google Play Movies
YouTube
Fandango At HomeClick a service to open Of Unknown Origin there. Availability last verified on June 20, 2026.
Where is Of Unknown Origin streaming around the world?
| Country | Streaming on | Rent / Buy |
|---|---|---|
| United States | — | Amazon Video, Apple TV Store, Google Play Movies |
| United Kingdom | — | Apple TV Store, Amazon Video, Google Play Movies |
| Canada | — | Apple TV Store, Amazon Video |
| Australia | — | Apple TV Store, Amazon Video |
| Germany | — | Apple TV Store, Amazon Video |
| Spain | Filmin | — |
About Of Unknown Origin
Of Unknown Origin is a 1983 English-language horror film directed by George P. Cosmatos. The cast is led by Peter Weller, Jennifer Dale, Lawrence Dane. It has a runtime of 1h 28m. Viewers rate it 5.8/10 across 100 ratings. In United States, it is available to rent or buy on Amazon Video and Apple TV Store.
Of Unknown Origin was produced by Canadian Film Development Corporation, Les Productions Mutuelles Ltée, and Famous Players and made in Canada and United States of America. It was released on November 23, 1983, and carries a R certification.
- Director
- George P. Cosmatos
- Writers
- Brian Taggert
- Release date
- November 23, 1983
- Original language
- English
- Age rating
- R
- Status
- Released
- Country
- Canada, United States of America
- Budget
- $4 million
- Production
- Canadian Film Development Corporation, Les Productions Mutuelles Ltée, Famous Players
Of Unknown Origin cast & crew
Of Unknown Origin was directed by George P. Cosmatos and written by Brian Taggert.
The cast features Peter Weller as Bart Hughes, Jennifer Dale as Lorrie Wells, Lawrence Dane as Eliot Riverton, Kenneth Welsh as James Hall, Louis Del Grande as Clete, and Shannon Tweed as Meg Hughes.
Behind the camera, the score was composed by Kenneth Wannberg, cinematography is by René Verzier, and it was produced by Pierre David and Claude Héroux.
Is Of Unknown Origin worth watching?
Of Unknown Origin holds an audience score of 5.8/10 from 112 ratings, a more divisive horror films.
At 1h 28m, it's an easy, time-light watch.
If you enjoy horror, Of Unknown Origin is worth a place on your watchlist.
How and where to watch Of Unknown Origin
Of Unknown Origin isn't on a subscription service in United States right now, but you can rent or buy it on Amazon Video, Apple TV Store, Google Play Movies, and YouTube.
Streaming rights change country by country and month by month, so the options above reflect United States today — switch your country at the top of the where-to-watch section to see availability elsewhere.
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Cast of Of Unknown Origin
Peter Weller
Bart Hughes
Jennifer Dale
Lorrie Wells
Lawrence Dane
Eliot Riverton
Kenneth Welsh
James Hall
Louis Del Grande
Clete
Shannon Tweed
Meg Hughes
Keith Knight
Hardware Salesman
Maury Chaykin
Dan Errol
Leif Anderson
Peter Hughes
Jimmy Tapp
Meg's Father
Gayle Garfinkle
Janis Wycoff
Earl Pennington
Mr. Thompson
Of Unknown Origin — FAQs
▸Where can I watch Of Unknown Origin in United States?
Of Unknown Origin is not on subscription streaming in United States right now, but you can rent or buy it on Amazon Video and Apple TV Store and Google Play Movies.
▸What language is Of Unknown Origin in?
Of Unknown Origin is originally in English. Subtitle and dub options vary by streaming service.
▸How long is Of Unknown Origin?
Of Unknown Origin runs 1 hours 28 minutes (88 minutes).
▸What is Of Unknown Origin rated?
Of Unknown Origin is rated R. It holds a 5.8/10 audience score from 112 ratings.
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