Angie Dickinson went into training for several days as an observer "nurse" at Mount Sinai Hospital in Los Angeles as research for her role as a nurse in this film.
Alfred Hitchcock was, in the 1950s, briefly attached to a quite different project with the same title. This has led some mistakenly to believe that this extremely un-Hitchcockian movie was once going to be a Hitchcock thriller.
Joan Potter's debut.