A reporter gets more than she bargained for when she tries to prove that a murder has occurred in Brian De Palmas disturbing thriller. Danielle (Margot Kidder) meets Phillip (Lisle Wilson) on a Peeping Tom-themed game show and, dodging her ex-husband Emil (William Finley), takes him back to her apartment. But Danielle has a separated Siamese twin sister, Dominique, who is not pleased about the overnight guest. Journalist neighbor Grace (Jennifer Salt) sees Phillip slaughtered by one of them through her window; the body vanishes before she can convince a skeptical detective (Dolph Sweet) to take a look. Determined to prove that shes right (and get a career-advancing story), Grace investigates, assisted by a private eye (Charles Durning), and becomes more involved in the relationships among Danielle, Dominique, and Emil than she ever expected. De Palma reworks elements of Alfred Hitchcocks Psycho and Rear Window to tell a timely and eerie tale about the fate of women who deviate from normalcy in ways that go beyond stabbings and voyeurism. Using split screens to ratchet up the suspense, De Palma also hints at a kinship between Grace and Danielle, as they are both patronized by various male authority figures. Bernard Herrmanns foreboding score adds to the Hitchcockian atmosphere (as does the darkly humorous final shot), but the nightmarishly surreal visit to a mental hospital signaled the technical virtuosity (and gore) that would characterize De Palmas subsequent work. Shot for little money, Sisters became quite profitable, establishing De Palmas directorial standing after a handful of little-seen independent films and one Hollywood debacle with Get to Know Your Rabbit (1970). Although Carrie (1976) would surpass it at the box office, Sisters is remarkable proof of De Palmas visual skill and ability to creep out his audience. ~ Lucia Bozzola, All Movie Guide