This is one of the only good shows I've ever seen on Nickelodeon, since it was made for the older audiences.
The show "Invader Zim" had many teenagish content (which is very rare to see on Nickelodeon nowadays) such as gross things and cruel actions against people and cute fuzzy animals. Most of the episodes were cut for timing and/or offensive content.
Invader Zim's triumph was at an end after a year later it was cancelled. Many people got very angry and Nickelodeon and when they had the chance they recorded the reruns and put it on the internet.
Oh and the creator of the show is Jhonen Vasquez
It's rare to find a TV show that has teenage content nowadays. Why must the paranoids have to be so cruel to our television network?