Which episode of "Rick and Morty"  aired unannounced on April 1, 2017 and was replayed every half hour from 8pm to 12am ET, as part of Adult Swim's annual April Fools' prank?
Rick and Morty (season 3) The third season of the animated television series "Rick and Morty" originally aired in the United States on Cartoon Network's late night programming block, Adult Swim. It premiered with "The Rickshank Rickdemption," which aired unannounced on April 1, 2017 and was replayed every half hour from 8pm to 12am ET, as part of Adult Swim's annual April Fools' prank. The episode was also simulcast as a looping live stream on Adult Swim's site. The remaining episodes began airing on July 30, 2017. The season will feature a total of 10 episodes.
Elements (miniseries) Elements is an American animated miniseries based on the show "Adventure Time" by Pendleton Ward. It aired as part of the show's ninth season on Cartoon Network from April 24 to April 27, 2017. "Adventure Time" 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, grow and shrink at will. In this limited event series, which itself follows the events of the "Islands" miniseries, Finn, Jake, and BMO return home to discover that Ooo has been turned into a veritable dystopia thanks to extreme elemental magic. Finn and Jake team up with Ice King (voiced by Tom Kenny), Betty (voiced by Felicia Day), and Lumpy Space Princess (voiced by Ward) to set things straight.