''Hey Arnold!'' (1996-2004) is a children's animated TV series created by [[WesternAnimation/TheSimpsons Matt Groening's]] brother-in-law, Creator/CraigBartlett, starring an eclectic -- and more often than not eccentric -- group of characters that navigate a sort of urban wonderland. It is the 6th cartoon in the Franchise/{{Nicktoons}} series.

Arnold is a generally mellow 4th-grader with a head shaped like an American football, who lives with his [[RaisedByGrandparents paternal grandparents]] and their (also eccentric) tenants in a boarding house. [[BlackBestFriend Gerald]] is his best friend and "the Keeper of [[UrbanLegend Urban Lore]]," who dispenses legendary tales of characters such as "Stoop Kid" (said to have been born on the stoop he can be seen, day or night, to glower from with promised vengeance to any who should think to violate his sacred site) or "Wheezin' Ed" (rumored to have a massive treasure cavern on the mysterious Elk Island).

Also notable among Arnold's neighbors and classmates is Helga Pataki, a female bully who openly scoffs at Arnold's positive attitude while secretly admiring him for his optimism. As the show developed, an increasing amount of focus was put on her [[{{Tsundere}} extremely conflicted]], melodramatic character and her utter ''obsession'' with the football-headed one -she once made a shrine of his likeness, [[{{Squick}} built entirely out of pieces of used gum that Arnold had chewed and left behind.]]

The show had a number of episodes dealing with the rather mundane aspects of childhood life, such as the crush on teacher episode, but more often ventured into the surreal, such as Arnold and Gerald encountering the [[AbsurdlySpaciousSewer labyrinthine realm of the Sewer King]] to retrieve Arnold's grandfather's watch, and having to duel with him to avoid being declared his "royal rat groomers." In later episodes more attention was paid to the LoveTriangle between Helga, Arnold, and Lila, the sickeningly sweet country girl who likes Arnold but does not LIKE-him like him (much to Arnold's chagrin), Helga's transparently dysfunctional and unhappy family life, and the mystery of Arnold's [[ParentalAbandonment missing parents]]--a story which will now never be fully told due to the show's cancellation and the aborted "Jungle Movie"... except some fans are [[ScrewDestiny virtually unbarred]] at trying to rally the masses to get the series its proper finale.

It premiered in 1996, and wound up production in 2000 (though the last episodes wouldn't be seen until around 2004). It had a movie in 2002 (although it was intended as a telefilm) titled Hey Arnold!: The Movie. Reception of the film by critics and fans of the show was very negative; after all, it ''was'' a pastiche of clichés and other stereotypes that were PlayedForLaughs, not to mention it went completely against what the show was about (Including the grounded, down to earth charm of the TV show), though the bad reviews of the film were mostly from fans of the show. Another movie had been planned, but was canceled when the telefilm was not a success. And there...we have trouble. The second movie was the impending GrandFinale of the show, now ScrewedByTheNetwork--though fans continue to do all they can to bring it to fruition.

Currently shows on TeenNick's Series/The90sAreAllThat programming block...

...And might well be on its way back now.

[[TheWikiRule Has an excellent Wiki]] [[http://heyarnold.wikia.com/wiki/Hey_Arnold_Wiki here]], as well as a [[http://tvtropes.org/pmwiki/crowner.php/BestEpisode/HeyArnold Best Episode Crowner.]]
* HeyArnold/TropesAToI
* HeyArnold/TropesJToP
* HeyArnold/TropesQToZ