Movie: The Man Who Knew Too Much (1956)
Doris Day is best remembered as a comedic actress with a good set of pipes, but she acquitted herself well in this thriller. And Hitch had very little to do with it. He didn't give her much direction on set, which she found concerning. So, she asked him what was up. "You have been doing what I felt was right for the film," he told her, "and that's why I haven't told you anything."
Although Day hasn't described Hitch as the tormentor Hedren knew, the director did leave a sick mark on her entire career. Day hated the song she had to sing in the film, and almost refused to record it. The song was "Que Sera, Sera (Whatever Will Be, Will Be)"—which would become the theme of her '60s TV show and her signature song.