Of Unknown Origin

Where to Watch Of Unknown Origin (1983) (Legally)

Two forces have claimed the house. Only one will survive.
Nov 23, 1983 CA 88 min R
5.8 ★ ★ ★ ★ ★
112 votes
Horror
Where can I watch “Of Unknown Origin” legally?
We don’t host streams or downloads. Below are legal provider hints for the US region first, with a fallback for other English-speaking regions if available.

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English-region fallback

Found availability signals for: GB
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Where to watch “Of Unknown Origin” (1983) legally online? See US options first, with English-region fallbacks.

What to expect (spoiler-free)

Planning a movie night? This is a spoiler-free snapshot of “ (1983).

Expect a Horror blend, with a runtime close to 88 minutes.

Cast highlights include Peter Weller, Jennifer Dale, Lawrence Dane, Kenneth Welsh.

The listed certification for some regions is “ (ratings vary by country).

Topics & keywords

new york city, based on novel or book, poison, animal attack, house, rampage, rat, canuxploitation, animals gone wild, giant rat, mousetrap

Official trailer

Watch the official trailer on YouTube

Plot

A man who recently completed rebuilding a townhouse becomes obsessed with a rat infestation until it becomes an interspecies duel.

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Gallery

Still from the movie Of Unknown Origin Still from the movie Of Unknown Origin Still from the movie Of Unknown Origin Still from the movie Of Unknown Origin Still from the movie Of Unknown Origin

FAQs

Where can I watch it legally?
We only share legal viewing options. Check the “Where to watch” box above for your region and verify on official listings.
Is it available for free?
Free availability depends on region, promotions, or ad-supported services. Always verify on legal providers—availability changes frequently.

Main cast

Peter Weller
Peter Weller
as Bart Hughes
Jennifer Dale
Jennifer Dale
as Lorrie Wells
Lawrence Dane
Lawrence Dane
as Eliot Riverton
Kenneth Welsh
Kenneth Welsh
as James Hall
Louis Del Grande
Louis Del Grande
as Clete
Shannon Tweed
Shannon Tweed
as Meg Hughes
Keith Knight
Keith Knight
as Hardware Salesman
Maury Chaykin
Maury Chaykin
as Dan Errol
Leif Anderson
Leif Anderson
as Peter Hughes
Jimmy Tapp
Jimmy Tapp
as Meg's Father