Trivia / Elmo's World

• Actor Existence Limbo: Michael Jeter, who played Mr. Noodle's brother, suffered a fatal seizure in 2003, while the show was still in production. The character would not return to the segments until 2017, when Elmo's World itself was rebooted. For the new segments, there are two brothers of Mr. Noodle (played by Daniel Koren and Daveed Diggs), alongside Bill Irwin reprising his role as the original Mr. Noodle.
• Reality Subtext: According to Kevin Clash, Mr. Noodle's brother Mr. Noodle was created because Bill Irwin was unavailable due to being busy with How the Grinch Stole Christmas!.