- Country: Canada, USA
- Genres: Crime, Drama, Horror, Thriller
- Release: 1997-01-10
- Director: Douglas Jackson
- Writers: Kevin Bernhardt
- Language: English
- Stars: Donald Sutherland , William McNamara , Lesley Ann Warren , Joe Pantoliano , Tia Carrere , Christian Tessier , Lenore Zann , Rosemary Dunsmore , Vlasta Vrana , Claudia Besso
- Runtime: 88 min
- Awards: N/A
- AKA: Der Feind in meinem Haus (Germany) , Естествен враг (Bulgaria) , Uno sconosciuto in casa (Italy) , Тайный враг (Russian Federation) , Natural Enemy (United Kingdom) , Enemigo natural (Mexico) , Besøk av fienden (Norway) , Enemigo natural (Spain) , Természetes ellenség (Hungary) , Veren vihollinen (Finland) , 同居人 背中の微かな笑い声 (Japan) , Natural Enemy , Le fils maléfique (Canada) , Wróg naturalny (Poland) , Inkräktaren (Sweden) , Natural Enemy - Der Feind in meinem Haus (Germany) , Ehthros ek fyseos (Greece) , Inimigo por Natureza (Brazil) , Hate (Germany)
- Plot: A businessman (Donald Sutherland) has a hotshot young new partner (William McNamara). What he doesn't realise is that his new partner is the son of his second wife, adopted into an abusive family at birth and now a raving psychopath out to murder his natural mother for whom he blames the miseries of his lifetime.
- IMDB:tt0119764
Natural Enemy Cast · · · ALL
Douglas Jackson
Director
Donald Sutherland
Ted Robards
William McNamara
Jeremy Harper
Lesley Ann Warren
Sandy Robats
Joe Pantoliano
Stuart
Tia Carrere
Christina
Christian Tessier
Chris Robards
Rosemary Dunsmore
Judy
Vlasta Vrana
Stanley
Claudia Besso
Claire
Serge Houde
Sherwood
Terry Haig
IRS Agent
Michael Caloz
Young Jeremy
Tedd Dillon
Father