chunk: Mark arranges with Vivian, a stand-in at the studio, to make a film after the set is closed; he then kills her and stuffs her into a prop trunk. The body is discovered later during shooting by a female cast member who has already antagonised the director by fainting for real at points which are not in the script. The police link the two murders and notice that each victim died with a look of utter terror on her face. They interview everyone on the set, including Mark, who always keeps his camera running, claiming that he is making a documentary.
  Helen goes out to dinner with Mark, even persuading him to leave his camera behind for once. Her mother finds his behaviour peculiar, aware how often Mark looks through Helen's window. Mrs. Stephens is waiting inside Mark's flat after his evening out with her daughter. She senses how emotionally disturbed he is and threatens to move, but Mark reassures her that he will never photograph or film Helen.