The Simpsons
The Simpsons will celebrate their 500th episode Reuters

The 500<sup>th episode of The Simpsons is due to air on 19 February and IBTimes UK celebrates with the top 10 little known Simpsons' facts.

The landmark episode will be called "At Long Last Leave" and feature controversial WikiLeaks founder Julian Assange.

In the show, the Simpsons discover that everyone in Springfield is finally sick of them and wants them out of their beloved home town.

The milestone is being marked with multiple celebrations by fans throughout the world. A Simpsons marathon of back-to-back episodes will be shown over four days.

Here's our top 10 Simpsons factoids:

10 In the Simpsons' universe, characters often watch McBain on TV, a parody of Arnold Sharwznegger. If you put each clip in order they make a coherent plotline and movie of their own.

9 The couch gags at the start of the show are selected depending on how long or short the episode is.

8 The Simpson's have email! Lisa's email address is "", and Homer's is "".

7 The aliens that feature heavily in Halloween episodes, Kang and Kodos, are named after Star Trek characters.

6 Comic Book Guy's real name is Jeff Albertson. Bumblebee Guy's real name is Pedro.

5 Lisa Simpson has celebrated her eight birthday twice in two different episodes.

4 764-84377 is the phone number for Moe's Tavern.

3 Every Simpson family member's middle name begins with the letter "J".

2 It took musicians two days to compose The Simpsons' theme song in 1989.

1 Creator Matt Groening named characters after his own family but instead of using his own name he used 'Bart' for the troubled son. Why? Because it's an anagram of the word brat.