Trivia

Although set in London, the film was mostly made on Hollywood studio sets. However, a second unit was sent to London to film backgrounds, and in these scenes a double was used for Danny Kaye, mostly filmed from behind or from a distance. The double was in fact a well-known British actor and comedian, Jon Pertwee. This may account for the fact that a character called "Sir Pertwee" appears in Kaye's subsequent film The Court Jester (1955), also made by the team of Melvin Frank and Norman Panama.

Mai Zetterling was not at all impressed by either the experience of filming in Hollywood for the first time or her co-star Danny Kaye, of whom she was extremely critical in her autobiography.

Along with Shane (1953), Sabrina (1954), The Country Girl (1954), Elephant Walk (1954), The Bridges at Toko-Ri (1954), Casanova's Big Night (1954), About Mrs. Leslie (1954), The Naked Jungle (1954), 3 Ring Circus (1954), Red Garters (1954) and Rear Window (1954), this was one of several Paramount pictures released in a generic widescreen aspect ratio just prior to the studio's implementation of the vastly superior VistaVision, which would be ushered in October of the same year with White Christmas (1954). All of these films were composed with extraneous footage at the top and bottom of the frame so they could be matted for rectangular projection. As of 2021, only Knock on Wood (1954), Rear Window (1954), Sabrina (1954) and Shane (1953) have been exhibited in their intended widescreen format, the first three on home video, the last only on Turner Classic Movies, along with MGM's The Long, Long Trailer (1954).

Final film of Winifred Harris.