Sisters (1972)

Advertising salesman Philip Woode is the victim of a prank on a Candid Camera-style television show and wins a dinner for two at a Manhattan restaurant. He takes with him Danielle Breton, a young French Canadian model and aspiring actress who was part of the prank. At dinner, they are interrupted by Danielle’s ex-husband, Emil, who also follows them to Danielle’s Staten Island apartment. After tricking Emil into leaving, Philip and Danielle make love on the sofa. There is a huge scar on her side.

They spend the night on the fold-out bed. Danielle wakes up in pain. In the bathroom, she empties a bottle of pills into her hand. There are four. She takes one and leaves two on the sink. Her sister calls from the bedroom in French (subtitled). They argue. We learn that after they were “separated,” Dominique was put in a hospital “full of lunatics.” The argument wakes Philip, who dresses in the bathroom, where he unwittingly knocks the pills down the drain.