Trivia: The Simpsons holds the record for most guest stars; it is also the only non-variety show to have had appearances from three former Beatles (Paul, George and Ringo).
Trivia: When the Quirks uses their noses to play a song to get rid of Koopa for good, they play the theme song from the video game The Legend of Zelda.
Trivia: The models were sold to Britt Allcroft in 1991 and were used (although heavily modified) in Thomas the Tank Engine and Friends as set dressing until 2009, when it became a CGI animated series. In 2013, eighteen of the original models were sold to the Star Tugs Company Ltd. (formerly The Star Tugs Trust) with the intention of having them restored for public display.