This is the last black-and-white feature appearance by Debbie Reynolds, performing her final monochrome song and dance - "Something Called Love" (music by Walter Kent, lyrics by Walton Farrar).
Bob Fosse in an uncredited part as one of the dancers in Debbie Reynolds's Something Called Love number.
In addition to featuring Alfred Hitchcock as an off-screen character in the film (the hero is supposed to be writing a film script for him), the film employs both Martin Landau and Robert Ellenstein in supporting roles, only a few months after their celebrated performances as villains in Hitchcock's "North By Northwest" (also for MGM). One might also note that Alec Coppel, on whose play the film is based, contributed to both of Hitchcock's two TV shows and was the first screenwriter to work on his earlier film "Vertigo" (although he was replaced).