What year did the television series "Rick and Morty" premiere?

Rick and Morty is an American adult animated science fiction sitcom created by Justin Roiland and Dan Harmon for Cartoon Network's late-night programming block Adult Swim. The series follows the misadventures of cynical mad scientist Rick Sanchez and his good-hearted but fretful grandson Morty Smith, who split their time between domestic life and interdimensional adventures.

Roiland voices the eponymous characters, with Chris Parnell, Spencer Grammer and Sarah Chalke voicing the rest of the family. The series originated from an animated short parody film of Back to the Future, created by Roiland for Channel 101, a short film festival co-founded by Harmon. The series has been acclaimed by critics for its originality, creativity and humor.

In May 2012, Adult Swim unveiled its development slate that included a Rick and Morty pilot from Harmon and Roiland, which was eventually picked up to series in October 2012, as one of the network's first primetime original shows. The first season premiered in December 2013 and concluded in April 2014. It comprised eleven episodes (including the pilot), and aired Mondays at 10:30pm ET/PT.