when did the first episode air?
April 5, 2010
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. 
who does the voice of marceline on adventure time Olivia Olson who is marceline? Marceline the Vampire Queen is a fictional character in the American animated Cartoon Network television series "Adventure Time" is this a cartoon? Yes does she have other appearances? Yes - she appears in in the first season episode "Evicted! ; In the third season episode "Memory of a Memory" who created her? Pendleton Ward. describe her in brief She is an American animator, screenwriter, producer, and voice actor who works for Cartoon Network Studios and Frederator Studios. what's the original character's personality like? She has evolved into a "fearless daredevil", and her fondness for mischief has turned her into something of a trickster. who does she keep relations with? Finn and Jake were there any controversies? The episode "What Was Missing" became controversial due to implications that Marceline and Princess Bubblegum had been in a past relationship. what did critics have to say about the character? Marceline has attracted positive critical attention. Oliver Sava of "The A.V. Club" praised her as one "of this show's most tragic characters". were there other critics? Yes - Susana Polo, Charlies Jane Anders, Lauren Rearick name a few other characters from this show Finn Mertens, Jake the Dog, Princess Bubblegum, King Worm on which channel did this show air? Cartoon Network who owns the channel? Global Kids, Young Adults and Classics division of Warner Bros. when was it established? The channel was launched on October 1, 1992 who does the voice overs for the characters from the original show? Finn Mertens is voiced by Jeremy Shada, Jake the Dog voiced by John DiMaggio, Princess Bubblegum voiced by Hynden Walch, King Worm voiced by Erik Estrada
wiki:19411999
Adventure Time (season 1) [SEP] Introduction
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.