David Cronenberg wrote and directed this disturbing film which dwells on the horrors of sexual intimacy (a recurring theme in his work). In a fancy high-rise apartment complex, the residents find themselves exposed to parasites that slither their way into their bodies. As the parasites make their way into their hosts, they cause a contagion that turns the victims into uncontrollable sex maniacs. Incest, pedophilia, rape, homosexuality, heterosexuality -- nothing matters as long as the residents' sexual lusts are fulfilled (and, in the process, the parasites are passed along to new bodies). But the disease spread by the parasites is lethal, with the sexual act both ecstasy and a death sentence. In a startling climax, the residents of the housing project are transformed into ravenous sexual creatures, screaming in both pain and pleasure in a strange orgy in a swimming pool. They Came From Within was Cronenberg's first "commercial" film, after directing two experimental features, Stereo and Crimes Of The Future. They Came From Within was revived in 1997 under the title Shivers.