Question: 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?
Sentence (from "Rick and Morty (season 3)"): The episode was also simulcast as a looping live stream on Adult Swim's site.
Relevant evidence: No