Soeurs de sang

Brian De Palma said the film's producer doubted anyone could be stuffed into a sofa bed, but the director recalls, "I shot it in one shot to show that you can in fact fit somebody into the sofa bed."

After leaving Danielle's apartment, Grace and her mother exit that building, and Grace's mother suggests she should change clothes. Grace then reenters the lobby of the same building, to go up to her own apartment.

Although it may not be apparent, Grace and Danielle live in the same apartment complex, in the same building. The former "Alexander Hamilton" - now 36 Hamilton Avenue - in Staten Island is an H-shaped building, meaning apartments on its inner courts face each other across two courtyards. Therefore, Grace has a view across one of the courtyards directly into Danielle's windows. In addition, the elevators that characters take to and from both apartments are identical.

For the original 1973 UK cinema release cuts were made by the BBFC to edit the violent stabbing of Phillip Woode. All later releases were fully uncut.

Featured in Terreur dans la salle (1984)