The Simpsons, amazingly enough, is in its 20th season. That's right folks. The irreverent and hilarious animated show has been around for two decades. It is a testament to the high quality of The Simpsons that it has stood the test of time and is still relevant. You have to wonder though, how long can this show last and still be funny?

One thing about The Simpsons is that it is multi-generational in that it appeals to people of all ages. It's funny to think that when the show started, the internet was in its pre-infancy stages and no one probably dreamed that one day tv would shown on the web. But here we are in 2009 and you can watch full length episodes of The Simpsons for free online.

There are a few places where you can go to watch The SImpsons episodes. One of them is Hulu. You can stream videos directly onto your desktop with no download necessary. There are typically 5 episodes of The Simpsons available on any given day at this site, but you can also watch clips from various episodes. Here's the link.

Another place you can find the show is at the Fox on Demand website, where you can watch on demand episodes of various Fox shows, including The Simpsons. This is a pretty cool webiste with a simple design that's easy to navigate.

The third place you can watch Simpsons episodes is Fancast. You can watch the previous five shows, three trailers, and over 1,300 clips from the current and previous seasons.

This is the show that wrote the rule book on primetime animated tv and kicked down the door for shows like Family Guy. Enjoy the show.

It's crazy to think how long the Simpsons has been around--about 20 years.  The only other show I can think of that has had that kind of staying power and cultural relevance is ER.  Watch ER episodes online at this link.