Last night's 'Simpsons 20th Anniversary Special: In 3-D! On Ice!' chronicled the impact of the long-running animated show, and profiled a number of 'Simpsons' enthusiasts and obsessives such as those in this clip.

One fan chose to tattoo his entire back with ink inspired by the 'Treehouse of Horror' Halloween specials; another has literally packed his U.K. home with the largest known collection of 'Simpsons' memorabilia.

Watch the video after the jump.

I've been holding this interview for almost six months, but I think it was worth it. When I was in Pasadena last summer for the TCA press tour (whose winter edition I'll be leaving for on Friday morning... eep!), I spoke to Morgan Spurlock about the 20th anniversary film he was making about The Simpsons. FOX has finally decided to air that film, entitled The Simpsons 20th Anniversary Special -- In 3-D! On Ice!, on January 10, along with the venerable cartoon's 450th episode.

Spurlock was just in the initial stages of filming the documentary when I talked to him, but his views on the show, how it and the perception of it has changed over the years, and some of the interesting things he learned about the show made for a fun interview. Since I didn't know how long the movie was going to be, I start the talk by expressing some surprise about its length.