Trivia: All of the singing in this film was dubbed by adult vocalists.
Trivia: The train crash at the end of the movie was filmed at Toronto's Union Station. While the layout of Union Station is irrelevant, it's interesting that the train's final position would have required it to cross the tracks at a 90° angle (more or less) and drop down onto the ramp that connects the Great Hall to the passenger departure area.
Trivia: Alfred Hitchcock's silhouette can be seen in the window of the registry of births and deaths office. He is the figure on the right pointing at the figure on the left.
Trivia: Kenneth Connor's line, "I've been regular for eighteen years", is an in-joke about his time in the "Carry On" films. He made his debut in 1958, and when the film was released in 1976, he was in the films for eighteen years.
Trivia: At the Iron Man's house, there is a painting of the Hindenburg airship disaster. Rene Auberjonois (Father Kudos) had previously starred in the 1975 movie The Hindenburg as Major Napier.
Trivia: After this movie was released, the character Engleberg had to be recast because the actor who played him lost a lot of weight and no longer could play the "fat" catcher so a new heavy actor replaced him in the next two sequels.
