Question: Hitman is an episode in the 3rd season of what animated series created by Pendleton Ward?

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In Your Footsteps: "In Your Footsteps" is the seventh episode of the fourth season of the American animated television series "Adventure Time".  The episode was written and storyboarded by Tom Herpich and Skyler Page, from a story by Patrick McHale, Kent Osborne, and Pendleton Ward.  It originally aired on Cartoon Network on April 30, 2012.  The episode guest stars Eric Bauza as a bear and features Ward voicing the Lich-possessed snail.

Adventure Time (season 6): The sixth season of "Adventure Time", an American animated television series created by Pendleton Ward, premiered on Cartoon Network on April 21, 2014 and concluded on June 5, 2015.  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.

Adventure Time (season 8): The eighth season of "Adventure Time", an American animated television series created by Pendleton Ward, premiered on Cartoon Network on March 26, 2016 and concluded on February 2, 2017.  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.

List of Adventure Time episodes: "Adventure Time" is an American animated television series created by Pendleton Ward for Cartoon Network.  The series follows the adventures of Finn (voiced by Jeremy Shada), a human boy, and his best friend and adoptive brother Jake (voiced by John DiMaggio), a dog with magical powers to change shape and grow and shrink at will.  Finn and Jake live in the post-apocalyptic Land of Ooo.  Throughout the series, they interact with the show's other main characters: Princess Bubblegum (voiced by Hynden Walch), the sovereign of the Candy Kingdom; the Ice King (voiced by Tom Kenny), a demented but largely misunderstood ice wizard; Marceline the Vampire Queen (voiced by Olivia Olson), a thousand-year-old vampire and rock music enthusiast; Lumpy Space Princess (voiced by Ward), a melodramatic and immature princess made out of "irradiated stardust"; BMO (voiced by Niki Yang), a sentient video game console-shaped robot that lives with Finn and Jake; and Flame Princess (voiced by Jessica DiCicco), a flame elemental and ruler of the Fire Kingdom.  The pilot first aired in 2007, and it was later re-aired on the incubator series "Random!  Cartoons" on Nicktoons Network.  The pilot eventually leaked onto the internet and became a cult hit on YouTube.  After Nickelodeon declined to turn the short into a full-fledged show, Cartoon Network purchased the rights, and "Adventure Time" launched as a series on April 5, 2010.

Adventure Time (season 4): 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.

Adventure Time (season 9): The ninth and final season of "Adventure Time", an American animated television series created by Pendleton Ward, premiered on Cartoon Network on April 21, 2017.  It is set to conclude sometime in 2018.  The season was produced by Cartoon Network Studios and Frederator Studios.  The season will follow 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.

James Baxter the Horse: "James Baxter the Horse" is the nineteenth episode of the fifth season of the American animated television series "Adventure Time".  The episode was written and storyboarded by series creator Pendleton Ward and Somvilay Xayaphone, from a story by Patrick McHale, Kent Osborne, and Ward.  It originally aired on Cartoon Network on May 6, 2013.  The episode guest stars animator James Baxter as the titular horse.

Adventure Time (season 3): The third season of "Adventure Time", an American animated television series created by Pendleton Ward, premiered on Cartoon Network on July 11, 2011 and concluded on February 13, 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, and BMO.

Adventure Time (season 1): The first season of "Adventure Time", an American animated television series created by Pendleton Ward, premiered on Cartoon Network on April 5, 2010 and concluded on September 27, 2010.  The season was produced by Cartoon Network Studios and Frederator Studios.  The series is based on a short produced for Frederator's Nicktoons Network animation incubator series "Random!  Cartoons".  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, and BMO.

Hitman (Adventure Time): "Hitman" is the name for the fourth episode of the third season of the American animated television series "Adventure Time".  The episode was written and storyboarded by Jesse Moynihan and Bert Youn, from a story by Mark Banker, Kent Osborne, Patrick McHale, and series creator Pendleton Ward.  It originally aired on Cartoon Network on August 1, 2011.

Supporting paragraphs: Hitman (Adventure Time) Adventure Time (season 3)
Answer: Adventure Time