Where to watch Of Unknown Origin (1983) tonight

Of Unknown Origin (1983) runs 1 h 28 min, is rated R in the US and averages 5.8 from 118 TMDB members. A man who recently completed rebuilding a townhouse becomes obsessed with a rat infestation until it becomes an interspecies duel.

Runtime

1 h 28 min — ends 9:28 pm if you start at 8:00 pm

Rated

R (US)

Genres

Horror

Released

November 23, 1983

TMDB rating

5.8 / 10 from 118 votes

Director

George P. Cosmatos

Starring

Peter Weller, Jennifer Dale, Lawrence Dane, Kenneth Welsh

Language

English

Where to watch it tonight

Streaming availability by JustWatch. As of 2026-11-06 it is not streaming on a subscription or free service in the US; it can be rented or bought on Amazon Video, Apple TV Store, Google Play Movies.

Questions people ask

How long is Of Unknown Origin?

Of Unknown Origin is 1 h 28 min long (88 minutes). If you start it at 8:00 pm it ends at 9:28 pm; add about 20 minutes if you watch trailers first.

What is Of Unknown Origin rated?

Of Unknown Origin is rated R in the US.

Is Of Unknown Origin a good movie to watch with a group?

Yes — a crowd movie. Horror hold a room: people can talk, laugh or scream over it and still follow what is going on. Rated R in the US — check who is in the room.

Where can I stream Of Unknown Origin?

As of 2026-11-06 it is not streaming on a subscription or free service in the US; it can be rented or bought on Amazon Video, Apple TV Store, Google Play Movies. Availability changes often; this page loads the live list for your country (streaming availability by JustWatch).

Lists it could be on

• Horror movies under 90 minutes
• Movies from the 80s
• The most-rated movies on TMDB

If you like Of Unknown Origin

• The Mist (2007)
• Nightmares (1983)
• Mimic (1997)
• Wolfen (1981)
• The Serpent and the Rainbow (1988)
• Sleepwalkers (1992)
• The First Purge (2018)
• The Relic (1997)

Of Unknown Origin on TMDB · This product uses the TMDB API but is not endorsed or certified by TMDB.