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Regular Show (also known as Regular Show in Space during its eighth season) is an American animated sitcom created by J. G. Quintel for Cartoon Network. The series revolves around the lives of two working-class friends, a blue jay named Mordecai and a raccoon named Rigby—both employed as groundskeepers at a local park. They usually try to solve a simple problem that leads to a surreal, extreme, and often supernatural misadventure. During these misadventures, they interact with the show's other main characters: Benson, Pops, Skips, Muscle Man, and Hi-Five Ghost.

Many of Regular Show's characters were loosely based on those developed for Quintel's student films at California Institute of the Arts: The Naïve Man from Lolliland and 2 in the AM PM. The former was one of the winners of the 2005 Nicktoons Film Festival and received international attention after being broadcast on Nicktoons Network. Quintel pitched Regular Show for Cartoon Network's Cartoonstitute project, in which the network allowed young artists to create pilots with no notes, which would possibly be optioned as shows. The project premiered on September 6, 2010 on Cartoon Network.

As of May 2013, the program had been watched by approximately 2 to 2.5 million viewers each week. The series has received positive reviews from critics and has developed a following of all ages, while also being controversial for its dark humor, adult jokes, violence, sexual innuendos, shock value, and mature themes. Regular Show has been nominated for several awards, including seven Annie Awards, six Primetime Emmy Awards—one of which it won for the episode "Eggscellent" (season 3, episode 18)—and three British Academy Children's Awards. A film based on the series, titled Regular Show: The Movie, premiered in 2015.

After eight seasons and 261 episodes, the series concluded on January 16, 2017, with the one-hour finale "A Regular Epic Final Battle".