Shivers, also known as The Parasite Murders and They Came from Within, and, for Canadian distribution in French, Frissons (IPA: /friːˈsoʊn/ free-SOHN; 'chills' or 'shivers'), is a 1975 Canadian science fiction body horror film written and directed by David Cronenberg and starring Paul Hampton, Lynn Lowry, and Barbara Steele.

At Starliner Towers, a luxury apartment complex outside Montreal, Dr. Emil Hobbes murders a young woman named Annabelle.

Nick Tudor, who has been suffering from stomach convulsions, finds their bodies but leaves without calling the police.

At the clinic, Roger sees a sexually active middle-aged resident who has been suffering from stomach convulsions.

Hobbes' ambition with his parasitic invention was to reassert humanity's unbridled, sexually aggressive instincts, and he used Annabelle as his guinea pig.

Nick tries to force his wife Janine to have sex with him, but she recoils in horror when one of the parasites crawls from his mouth.

Linsky arrives at Starliner Towers and goes to the Tudor apartment, as Roger had identified Nick as someone Annabelle might have infected.

The rest of the infected, including the little girl from the elevator, plunge into the pool fully dressed or otherwise and swim towards Roger to hold him down.

Early the next morning, news reports encourage listeners not to panic as police investigate an epidemic of sexual assaults in Montreal.

After finishing Crimes of the Future David Cronenberg lived in Tourrettes-sur-Loup, France, where he shot filler for the Canadian Broadcasting Corporation using a 16 mm camera he purchased with a Canada Council grant.

During his time in France he went to the Cannes Film Festival where he realized that he "couldn't make movies like Stereo and Crimes and consider myself a professional film-maker" and that he needed a broader audience.

[3] Cinépix was attempting to enter the American market and John Dunning believed that Cronenberg's film would aid them.

[4][5] It took around three years to gain financial backing from the Canadian Film Development Corporation which viewed the movie as "disgusting, awful, horrific, perverse" according to Cronenberg.

[16] On September 15, 2020, Lionsgate issued the film on Blu-ray in the United States as part of its Vestron Video Collector's Series.

[20] Canadian critics such as Martin Knelman, in The Globe and Mail, and Dane Larnken, in the Montreal Gazette, gave the film negative reviews.

[23] However, Fulford, writing under the pseudonym Marshall Delaney, decried the content of Shivers in the national magazine Saturday Night.

[26] The controversy over the sexual and violent content of Shivers grew to the point that the Parliament of Canada debated the film's social and artistic value and effect upon society.