Themes and plot devices in Hitchcock films other iconic stairwell shot comes from the movie "Suspicion" as Cary Grant slowly walks up the stairs to deliver what would have been the poisonous warmed milk to his wife. Hitchcock, the studios and Grant decided his character could not end up as a murderer and that scene becomes a red herring with a new ending added. In "The Birds", the camera follows Tippi Hedren up the stairs to the attic where (suspensefully) the birds wait silently to attack her. Staircases also appear prominently in the 'ball-gown scene' in "Rebecca" and in the 'guard-dog scene' in "Strangers on a Train".
Alfred Hitchcock start gathering, watching, and attacking. The question: "What do the birds want?" is left unanswered. Hitchcock made the film with equipment from the Revue Studio, which made "Alfred Hitchcock Presents". He said it was his most technically challenging film yet, using a combination of trained and mechanical birds against a backdrop of wild ones. Every shot was sketched in advance. An HBO/BBC television film, "The Girl" (2012), depicted Hedren's experiences on set; she said that Hitchcock became obsessed with her and sexually harassed her. He reportedly isolated her from the rest of the crew, had her followed, whispered obscenities to