that the couch contains the body. He also finds a thick file from the Loisel Institute on the Blanchion Twins, Canada's first conjoined twins. Grace's further investigations uncover that the twins were separated only recently, and that Dominique apparently died during the operation. As Larch pursues the truck that Emil called to haul the couch away, Grace tails Emil and Danielle to a mental hospital. When she is caught, Emil convinces the staff that she is a new patient. He sedates her and promises to reveal everything, placing Danielle on the bed beside her. Grace has a bizarre dream about the twins' past and their separation, in which she herself is Dominique. Emil tells Danielle that the separation was necessary to save Danielle from the violent Dominique, who died during the surgery. Whenever she has a sexual experience, Danielle now dissociates to a violent "Dominique" personality. Emil kisses Danielle passionately to bring forth "Dominique," but she slashes him in the groin with a scalpel, and he bleeds to death. Grace awakens to find the sorrowful Danielle tenderly embracing Emil's bloody body and screams in horror. Detective Kelly arrests Danielle, who denies knowledge of the murders and says that her sister is dead. Kelly interviews Grace, who is still under Emil's hypnotic spell, repeating lines that he fed her to deny there was a murder. Larch tracks the sofa to a remote train station in Canada. Cast Margot Kidder as Danielle Breton / Dominique Blanchion Jennifer Salt as Grace Collier William Finley as Emil Breton Charles Durning as Joseph Larch Lisle Wilson as Phillip Woode Barnard Hughes as Arthur McLennen Mary Davenport as Mrs. Peyson Collier Dolph Sweet as Detective Kelly Olympia Dukakis as Louise Wilanski (uncredited) Catherine Gaffigan as Arlene Justine Johnston as Elaine D'Anna James Mapes as Guard Burt Richards as Hospital Attendant Bill Durks as a Sanitorium resident Analysis Scholarly discussion of Sisters has centered largely on its prevalent theme of voyeurism as well as a perceived commentary on the women's liberation movement. Film critic and scholar Robin Wood wrote that the film "analyzes the ways in which women are oppressed within patriarchy society on two levels, the professional (Grace) and the psychosexual (Danielle/Dominique)." He adds: "If the monster is defined as that which threatens normality, it follows that the monster of Sisters is Grace as well as Danielle/Dominiquea point the film acknowledges in a cinematic hallucination/flashback sequence