Of Unknown Origin
- Gore: 1983
- Nyika: Canada, United States of America
- Genre: Horror
- Studio: Canadian Film Development Corporation, Famous Players Limited, Warner Bros. Pictures, Les Productions Mutuelles Ltée
- Keyword: new york city, based on novel or book, poison, animal attack, house, rampage, rat, canuxploitation, animals gone wild, giant rat, mousetrap
- Mutungamiriri: George P. Cosmatos
- Cast: Peter Weller, Jennifer Dale, Lawrence Dane, Kenneth Welsh, Louis Del Grande, Shannon Tweed