Final film of Peter Lorre.
In the ending, Jerry Lewis' character supposedly falls from the terrace of a tall building then, as Ina Balin's character is bewailing his death, Lewis strolls past the edge of the terrace revealing that the whole thing is a movie set. Lewis and Balin then walk off the set. In an interview Lewis (who both co-wrote and directed) said that he couldn't think of a good ending so he decided to go this way.
The plane crash scene at the beginning of the movie was taken from The Mountain.
This is the only Jerry Lewis solo film that mentions Dean Martin by name. Ed Sullivan includes Martin & Lewis in a list of famous acts that made their debuts on his show.