Though Cybill Shepherd only wears one costume in the movie, (a bias-cut white satin dress), the costume department made nine identical copies to facilitate filming.
Bette Davis was offered the role of Miss Froy. Davis told biographer and friend Whitney Stine ("I'd Love to Kiss You ... Conversations with Bette Davis"), "I loved May Whitty in the original, but I don't think the part is quite right for me. She should be a plump, sweet old lady." The part went to Dame Angela Lansbury, who had co-starred with Davis in Mort sur le Nil (1978).
Second of two late 1970s remakes of Alfred Hitchcock movies from Hitchcock's English black-and-white 1930s period. This movie is a remake of Une femme disparaît (1938). The first was Les 39 marches (1978) (a remake of Les 39 marches (1935)).