First appearance of Eileen, who later becomes a major character. Also, the subversion of "unicorns" as magical creatures—here, they are goth, smoking, vandalizing punks.
September 13, 2010 (paired with Episode 2)
Mordecai and Rigby accidentally create a giant, sentient hot dog while messing with the park’s grill. The hot dog goes on a rampage, and they must stop it before Benson finds out they ruined company property. regular show season 1 all episodes
October 18, 2010
Original airdate: October 11, 2010 The park bans meat. Mordecai and Rigby sneak burgers from a mysterious van, only to discover the meat is alive and seeks revenge. The burgers attack the park. First appearance of Eileen, who later becomes a
The duo also had a knack for bringing the past back to haunt them. They faced off against
after getting trapped in a meat locker. Even their attempts to be "cool" backfired, like when they tried to impress Margaret and ended up fighting a personified version of a prank call in The Unicorns Have to Go Clocking Out The hot dog goes on a rampage, and
Below, we break down in order, including release dates, plot summaries, iconic quotes, and why each episode matters to the show’s legacy.
Rigby tries to impress a female raccoon, Eileen (in her first appearance), by pretending to be mature. He steals a cursed crown from a group of delinquent, graffiti-tagging unicorns. The unicorns unleash chaos on the park, forcing Mordecai and Rigby to fight them with basketball.
After Rigby loses a simple bet, he must make Mordecai the perfect grilled cheese sandwich. But Rigby attempts to cheat by using a magical, reality-bending cookbook called "The Sniffling Chef." The sandwiches come to life and attack.