Trivia: Shirley Jones was pregnant during the movie. She wore a special corset to conceal this. Director Morton DaCosta did not want anyone else involved in the movie to be aware of her pregnancy. He was so successful, that it was not until the kissing scene on the bridge that Robert Preston (Harold Hill) found out, when he was shocked to feel Jones' baby kicking him in the stomach.
Trivia: The first Carry On filmed in colour.
Trivia: "Quackodile Tears" was Arthur Davis' final cartoon as director for Warner Bros. Many printed sources erroneously credit Friz Freleng with directing this cartoon.
Trivia: Look out for a caricature of director Friz Freleng on a dollar bill in the opening credits.
Trivia: This is the first Godzilla movie in colour. Thanks to that, we get confirmation that Godzilla is not green, and that his atomic breath is blue and not just ordinary fire.
Trivia: Towards the end of the film, in various scenes involving trains & railways, if you look carefully, you can quite see that no attempt has been made to disguise the loco's etc. into German locos. You can quite see in various shots 'British Railways' and the British Railways roundel etc. If you know your train stuff, you can quite see all the locos, coaches, wagons etc. are British Railways stock. Also, in the scene in the big station before Dirk Bogarde is captured, and put into a room out the back with his fellow escapees, if you look closely in the background, the station is London Victoria by the way, you can quite see a SR suburban EMU waiting in one of the bay platforms.