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?
The Rickshank Rickdemption "The Rickshank Rickdemption" is the first episode in the third season of the American animated television sitcom "Rick and Morty", and the twenty-second episode overall in the series. It was written by Mike McMahan and directed by Juan Meza-Leon. The season three premiere first aired unannounced on Adult Swim in the United States on April 1, 2017 when it was watched by 676,000 American households. On the first day of its original broadcast, "The Rickshank Rickdemption" was replayed every half hour from 8pm to 12am ET with improved ratings, as a part of Adult Swim's annual April Fools' Day joke.
Final episode of The Colbert Report The untitled final episode of American late-night comedy television series "The Colbert Report" is the 1,447th episode of the series overall and is part of the eleventh season. The final episode of "The Colbert Report" originally aired in the United States on December 18, 2014 on Comedy Central. In the episode Stephen becomes immortal after accidentally killing "Grimmy" during the opening of the segment of "Cheating Death with Dr. Stephen T. Colbert, D.F.A.". This leads to Stephen singing "We'll Meet Again" in its entirety along with a large crowd of several recognizable figures, before meeting with Santa Claus, Abraham Lincoln, and Alex Trebek on the roof of the studio.