Question: What was the name of an animated American television series which is set in a post-apocalyptic world, with an episode named Reign of Gunters?
Context: The Walking Dead is an American post-apocalyptic horror television series developed by Frank Darabont for AMC that is based on the eponymous comic book series of the same name by Robert Kirkman, Tony Moore, and Charlie Adlard.  Andrew Lincoln plays the show's lead character, sheriff's deputy Rick Grimes, who awakens from a coma discovering a world overrun by zombies, commonly referred to as "walkers".  Grimes reunites with his family and becomes the leader of a group he forms with other survivors.  Together they struggle to survive and adapt in a post-apocalyptic world filled with walkers and opposing groups of survivors, who are often more dangerous than the walkers themselves.  Much of the series takes place in and around Atlanta, Georgia, and Alexandria, Virginia. The following is an episode list of "Bonkers", an animated American television series that first aired from September 4, 1993 to February 23, 1994 and then continued airing as reruns until 1995 on The Disney Afternoon (with select episodes airing on The Disney Channel from February to June 1993 as a preview for the series).  The series was set in a "Roger Rabbit"-like world where "toons" and humans co-exist. Thunderstone is an Australian children's science fiction television series produced by Jonathan M. Shiff Productions set in a post-apocalyptic world after Earth is hit by a comet.  The main character Noah is played by Jeffrey Walker (also known for his roles in "Ocean Girl", "The Wayne Manifesto", and "Mirror, Mirror").  Other actors who appear in the series are Gerard Kennedy, Christopher Elliott (who later appeared in "Under Jakob's Ladder"), Emily Browning (who later appeared in "Lemony Snicket's A Series of Unfortunate Events"), and Daniel Daperis. The fourth season of "Adventure Time", an American animated television series created by Pendleton Ward, premiered on Cartoon Network on April 2, 2012 and concluded on October 22, 2012.  The season was produced by Cartoon Network Studios and Frederator Studios.  The season follows the adventures of Finn, a human boy, and his best friend and adoptive brother Jake, a dog with magical powers to change shape and size at will.  Finn and Jake live in the post-apocalyptic Land of Ooo, where they interact with the other main characters of the show: Princess Bubblegum, The Ice King, Marceline the Vampire Queen, Lumpy Space Princess, BMO, and Flame Princess. "The Fairly OddParents" is an animated American television series that airs on Nicktoons, and previously Nickelodeon.  The series is based on a series of "Oh Yeah!  Cartoons", beginning with the short "The Fairly OddParents!" . Kurogane Communication (Japanese: 鉄コミュニケイション , Hepburn: Kurogane Komyunikeishon ) is a manga series written by Hideo Kato and illustrated by Tomomasa Takuma.  The individual chapters were originally serialized in "Dengeki Daioh" in 1997 and published in two "tankōbon" volume by MediaWorks.  Set in a post-apocalyptic world in which a lone human survivor, a girl named Haruka, lives with a family of five robots.  The manga series is licensed for an English language release in North America by Go!  Comi. "Reign of Gunters" is the twenty-fourth episode of the fourth season of the American animated television series "Adventure Time".  The episode was written and storyboarded by Ako Castuera and Jesse Moynihan, from a story by Patrick McHale, Kent Osborne, Pendleton Ward, and Adam Muto.  It originally aired on Cartoon Network on October 8, 2012. "The Fried Chicken Flu" is the 13th episode of the third season of the American animated television series "The Boondocks".  It first aired in the United States on Cartoon Network's programming block Adult Swim on August 1, 2010 and on Centric on November 15, 2010.  In the episode, the Freemans must survive in a post-apocalyptic world after a virus originating from fried chicken erupts across the country. Fist of the North Star (Japanese: 北斗の拳 , Hepburn: Hokuto no Ken , lit.  "Fist of the Big Dipper") is a Japanese manga series written by Buronson and illustrated by Tetsuo Hara.  Serialized in "Weekly Shōnen Jump" from 1983 to 1988, the 245 chapters were initially collected in 27 "tankōbon" volumes by Shueisha.  Set in a post-apocalyptic world that has been destroyed by a nuclear war, the story centers on a warrior named Kenshiro, the successor of a deadly martial art style known as "Hokuto Shinken", which gives him the ability to kill most adversaries from within through the use of the human body's secret vital points, often resulting in an exceptionally violent and gory death.  Kenshiro dedicates his life to fighting against the various ravagers who threaten the lives of the weak and innocent, as well as rival martial artists, including his own "brothers" from the same clan. Countdown is a young adult novel series by Daniel Ehrenhaft under the pen name Daniel Parker.  Set in a post-apocalyptic world, the series chronicles the year 1999 in short novels which represent individual months of the year.  The series begins with "January" and follows the lives of its main characters through "December".
Answer: Adventure Time