"#REHASH" is the ninth episode in the eighteenth season of the American animated television series "South Park". The 256th overall episode, it was written and directed by series co-creator and co-star Trey Parker. The episode premiered on Comedy Central in the United States on December 3, 2014. The episode is part one of the two-part season finale. The episode lampoons the popularity of Internet Let's Play celebrities and the phenomena of Internet trending topics that lack actual relevance