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