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 "List of The Brak Show episodes"): The series officially premiered with "Goldfish" on September 2, 2001, on Adult Swim, and ended with three seasons and 28 episodes on December 31, 2003, with "Cardburkey".
Relevant evidence: No