Horror flick from the early 1980s, Of Unknown Origin comes across like a grisly, live-action version of Tom and Jerry.
Our inept hero is the ambitious, house-proud executive Bart Hughes
(Peter Weller), who is left alone by his wife and son to complete a
business proposal only to discover that he is sharing his apartment with
a mischievous giant rat. Unable to trap or poison his foe, Hughes
quickly descends into nightmare-haunted madness and thus the stage is
set for a suspense thrilling battle of wits that is less cat-and-mouse than
1983, 88 min.