Question: When did The Simpson's episode air that introduced the character Nelson Muntz?

Context articles: Nancy Cartwright
Lisa's Date with Density
Loan-a Lisa
Laurence Breuls
List of Home and Away characters (1988)
Nelson Muntz
The Haw-Hawed Couple
Fight Quest
Stealing First Base
Bart the General

Nancy Jean Cartwright (born October 25, 1957) is an American voice actress, film and television actress, and comedian.
 She is known for her long-running role as Bart Simpson on the animated television series "The Simpsons".
 Cartwright also voices other characters for the show, including Nelson Muntz, Ralph Wiggum, Todd Flanders, Kearney, and Database.
"Lisa's Date with Density" is the seventh episode of "The Simpsons"<nowiki>'</nowiki> eighth season.
 It originally aired on the Fox network in the United States on December 15, 1996.
 It was written by Mike Scully and directed by Susie Dietter.
 The episode sees Lisa develop a crush on Nelson Muntz, which eventually leads to Lisa and Nelson dating.
"Loan-a Lisa" is the second episode of "The Simpsons"' twenty-second season.
 It originally aired on the Fox network in the United States on October 3, 2010.
 In the episode, Lisa helps fund Nelson's bicycle company with money Grampa Simpson gives her as part of his inheritance, but after Nelson meets Facebook founder Mark Zuckerberg and is convinced he can be successful by dropping out of school, Lisa tries to convince Nelson to stay in school.
 Meanwhile, Homer gets addicted to buying expensive items and returning them.
Laurence Breuls is an Australian actor.
 Breuls made his television debut portraying the character Nelson McFarlane on "Home and Away" in 1995, and his film debut playing the lead role of Jared in the 1997 film "Blackrock".
 Breuls performance in "Blackrock" was praised by David Rooney from "Variety", who said Breuls "kept his intensity cranked to just the right level, making it easy to empathize with the character."
"Home and Away" is an Australian television soap opera.
 It was first broadcast on the Seven Network on 17 January 1988.
 The following is a list of characters that first appeared in that year, by order of first appearance.
 They were all introduced by the show's executive producer Alan Bateman who oversaw the serial before being succeeded by series producer Des Monaghan whose episodes first began airing in November.
 Sixteen of the original eighteen regular characters debuted in the pilot episode.
 The Fletcher family consisting of Frank Morgan, Tom and Pippa Fletcher, Carly Morris, Steven Matheson, Sally Keating and Lynn Davenport were introduced first.
 Summer Bay residents Alf Stewart, Floss and Neville McPhee, Bobby Simpson, Donald Fisher, Ailsa Hogan, Martin Dibble, Lance Smart and Matt Wilson also made their debuts.
 They were soon joined by Alf's daughter Roo and sister, Celia.
 In March, Lyn Collingwood arrived as Lance's mother, Colleen.
 The same month, Liddy Clark began playing Kerry Barlow and Amanda Newman-Phillips joined the cast as Narelle Smart.
 In April, Gerry Sont began playing Brett Macklin, a love interest for Roo.
 Barbara Stephens and Cornelia Frances arrived in June as Alf's other sisters Barbara Stewart and Morag Bellingham, respectively.
 July saw Simon Kay enter as Donald and Barbara's son Alan Fisher.
 Gavin Harrison began playing Revhead in August and was soon followed by John Morris as Philip Matheson.
 That month saw the serial's first birth Christopher Fletcher, son of the established Tom and Pippa.
 Another birth occurred in September, Martha Stewart, daughter of Roo and Brett.
 Sandie Lillingston joined the cast in the same episode as Brett's sister, Stacey and in November, George Leppard guested as Al Simpson.
Nelson Mandela Muntz is a fictional character and the lead school bully from the animated TV series "The Simpsons".
 He is voiced by Nancy Cartwright.
 Nelson was introduced in Season 1's "Bart the General" as an antagonist but later turned into a on-and-off friend of Bart Simpson.
 He is well known for his signature mocking laugh "Ha-ha!"
"The Haw-Hawed Couple" is the eighth episode of "The Simpsons"<nowiki>'</nowiki> eighteenth season.
 It first aired on the Fox network in the United States on December 10, 2006.
 In the episode, Bart becomes Nelson's new best friend and under Nelson's protection no one dares to mess with Bart.
 It was written by Matt Selman and directed by Chris Clements.
 In its original run, the episode received 8.29 million viewers.
 The episode's title is a pun on "The Odd Couple", emphasizing Nelson's style of laughing.
 A fictional character featured in this episode, Angelica Button, was later used in the season 19 episode, "Smoke on the Daughter".
Fight Quest is a television show on the Discovery Channel that had a preview episode air on December 28, 2007 and began airing weekly on January 4, 2008.
 The show followed Jimmy Smith and Doug Anderson as they travel around the world learning different styles of martial arts, spending five days training with notable masters of the styles they are studying, before exhibiting what they have learned in a final demonstration and/or fight.
 According to quotes by the hosts, the show was mostly unscripted and a true challenge.
 At the end of February an updated DVD box set was released that included the final three episodes not in the original release.
 The series was canceled at the beginning of the second season and only three episodes aired, the last one ended on October 3, 2008.
"Stealing First Base" is the fifteenth episode of "The Simpsons<nowiki>'</nowiki>" twenty-first season.
 It originally aired on the Fox network in the United States on March 21, 2010.
 In this episode, Bart falls in love with a girl named Nikki from a second fourth grade class, but when he kisses her, Nikki begins treating Bart like dirt.
 Meanwhile, First Lady Michelle Obama teaches Lisa that there is no shame in being an overachiever, and Nelson Muntz teaches a blind boy how to be a schoolyard bully.
"Bart the General" is the fifth episode of "The Simpsons"<nowiki>'</nowiki> first season.
 It originally aired on the Fox network in the United States on February 4, 1990.
 The episode deals with Bart's troubles with the bully Nelson Muntz.
 Bart chooses to go to war with Nelson uniting the neighborhood children against him.
 The episode was written by John Swartzwelder and directed by David Silverman.