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 "The Rickshank Rickdemption"): 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.
Relevant evidence: No