Mordecai fears of being embarrassed by his mother when C.J. wants to come over for a family dinner.

After breaking off his friendship with Hi-Five Ghost over an embarrassing video, Muscle Man tells Mordecai and Rigby the story of how he and Hi-Five Ghost met back in high school when he was the big man on campus — until new kid Hi-Five Ghost comes in and usurps his title.

C.J. competes in a mini-golf tournament to win a card that permits people to cut in line at their favorite restaurant, but things hit a snag when C.J. has to compete against her overly-competitive father.

The park workers tell scary stories to keep Muscle Man awake while driving to visit his mother on Halloween. (1/2)

The park workers tell scary stories to keep Muscle Man awake while driving to visit his mother on Halloween. (2/2)

Muscle Man gives the group a list of things that he wants to do before "the end." When everyone realizes he is serious, they decide to make Muscle Man's final wishes come true.

Feeling unappreciated, Rigby quits his job at the park and gets a job with a moving company.

Rigby plans to surprise Eileen by setting up her new flat screen TV for her, but things take a turn when Eileen's roommate interferes.

Rigby suspects that Thomas is a Russian Spy, and when he finds out that it's true, it's up to him, Mordecai, and Benson to save the park from the KGB. (1/2)

Rigby suspects that Thomas is a Russian Spy, and when he finds out that it's true, it's up to him, Mordecai, and Benson to save the park from the KGB. (2/2)

The park guys plan revenge on Muscle Man for giving them prank gifts every year during their White Elephant Gift Exchange.

Margaret returns to town for Eileen's Christmas party, which complicates things for Mordecai now that he is with C.J. -- and things get worse when Mordecai breaks C.J.'s heart.

Following the events of "Merry Christmas Mordecai," Mordecai tries to make things right with C.J. with the help of a shirtless street saxophonist, but each of his solutions make things worse.

Benson is invited to a park managers' luncheon by Gene, but his employees worry that it might be a trap.

Mordecai and Rigby are accidentally sent to Australia, so they have to look for a way to get to the airport, or else their boss Benson will have them fired for being late.

After his stockbroker is arrested on fraud charges, Muscle Man and Starla compete on a game show where couples compete to win an all-expenses-paid wedding.

Mordecai, Rigby, C.J., and Eileen head to the beach to watch the sea turtles hatch and head into the ocean, but they stumble upon a beachside resort where the wealthy are using turtles in their spas as a fountain of youth.

Mordecai, Rigby, Muscle Man, Hi-Five Ghost, and their boss Benson set out to stop an impending war coming from a new format, DVD.

Mordecai and Rigby are determined to win a happy birthday song contest so they can get a year's supply of cake.

Benson finds a suit in the park and begins wearing it to command respect - only to learn that the government made the suit, and corrupt leaders and business people will stop at nothing to get it.

Mordecai, Rigby and their boss Benson set out to find a rare video game patch from a old video game.

Mordecai tries to avoid further relationship problems when he attends Margaret's 1000th chopper flight party for her father.

An alien pod crashes onto Earth and an alien horse known as Party Horse turns to Mordecai and Rigby to help him pass a U.S. History test.

The group tries to find different ways to keep the park open when Mr. Maellard announces his plans to shut down the park due to lack of attendance.

After Mordecai and Rigby crash their cart into the garage door, they have to replace it with help from Pops and the Eggscellent knight, or their boss Benson will have them fired.

In an homage to all things mecha anime, Mordecai and Rigby have to get rid of a cassowary in the park, which turns into an epic battle over merchandising rights when the baby ducks and full-grown geese return to enlist the help of the park workers to defeat a pair of lawyers and their iron-clad contracts. (1/2)

In an homage to all things mecha anime, Mordecai and Rigby have to get rid of a cassowary in the park, which turns into an epic battle over merchandising rights when the baby ducks and full-grown geese return to enlist the help of the park workers to defeat a pair of lawyers and their iron-clad contracts. (2/2)

After the events of "1000th Chopper Flight Party", C.J. comes over to forgive Margaret for what happened then (and what happened on "Merry Christmas, Mordecai") and invites her on a double date with her and Mordecai. The trouble is, Margaret lied about havin a boyfriend so she could calm C.J. down from her rage and must keep up the masquerade with the help of Eileen and Rigby's outlandish story of how they met.

Mordecai and Rigby fight with the power of death-kwon-do to help Sensei obtain a new stomach for his much need stomach transplant. But Sensei's trainee, Jimmy, wants it to himself.

Mordecai and Rigby have to remember all of their food challenges so that they can eat a 10ft sandwich.

The group helps Muscle Man and Starla on their wedding day. Still, it's Mordecai, whose relationship is in danger when Margaret gets invited, and an awkward speech leads to a final falling-out between Mordecai and CJ.

Benson will have Mordecai fired if Rigby can't bring him back from a strange land of dudes known as Dumptown USA.

When Benson is yet again snubbed for a Parkie Award for Manager of the Year in favor of Gene the Vending Machine, the rest of the gang try to make Benson feel better with a guy's night out... after Rigby makes off with the award Gene just won.

When Rigby ruins Maellard's fancy lunch, either he or Benson must write a letter of resignation before 5:00 pm, or they'll both be fired.

Margaret auditions for the chance to host a weekly news segment by doing an undercover investigation piece. Still, a mysterious, trenchcoated informant à la Deep Throat keeps giving her bogus leads.

Benson is determined to prove he was right about the date of the "Dome Experiment," a month-long experiment in which the park workers are locked in a bio-dome. After the dome comes a day early, all signs point to a possible conspiracy over the dome's real intentions.

After overhearing Mordecai tell Skips that he gives the worst birthday presents, Rigby teams up with a video game programmer to make Mordecai the best gift ever.

When Benson threatens to blow the whistle on Mordecai and Rigby's Funny Video Fridays, the duo distracts Benson with viral videos showing cats doing cute and crazy things, turning their boss into a cat video addict.

Muscle Man and Hi-Five Ghost get struck by lightning and develop amnesia.

Benson tries to spice up the park's annual Halloween party by renting a wish-making machine.

Mordecai and Rigby want to help Party Horse get back together with his girlfriend.

After staying up for two straight nights watching a movie marathon, Mordecai and Rigby have to get their sleep cycle back on track.

Rigby and Eileen get called away to Don's black belt ceremony, forcing Mordecai and Margaret to hang out alone – and Mordecai to confront his feelings for Margaret now that he's single.

Benson gets a pet pig named Applesauce and asks Mordecai and Rigby to look after him.

Rigby goes back to high school to graduate and earn his diploma, something he keeps secret from Eileen. But Eileen becomes suspicious when Rigby repeatedly cancels their dates.

In order to get high school credits, Rigby has to pass a foreign language class taught by Benson in China.

Rigby is irate that Eileen always correctly guesses the surprise dates he plans for her, sometimes before he can even tell her. He develops an elaborate, circuitous plan involving numerous fake locations and a fake biker gang to throw her off.

Pops is chosen to appear on a game show called Win That Prize and ends up being hired to a local TV station when his ideas and appearances become popular.

Eileen, Rigby, Mordecai, and Margaret go on a snow tubing trip while Eileen tries to conquer her fear of snow tubing.

Benson wants to get some street cred with the Park Managers’ Association and win the big chili cook-off.

The guys try to return a movie before they get hit with a late fee. Still, the tape gets stuck in the VCR.

Rigby's high school nemesis returns and tries to stop him from graduating from high school by making sure he fails gym class.

Thomas reunites with the Park Crew for one last Guys Night together before he goes into hiding forever.

When Mordecai and Rigby mess around with the cables in an old synthesizer, Gary disappears, and the guys then have to find a way to bring him back.

After Rigby wins a king-size bed, he gets rid of his trampoline but quickly regrets his decision and tries to get his trampoline back.

Feeling that the park guys only care about his strength, Muscle Man decides to prove that he can be smart by working in a corporate office.

Mordecai and Rigby have to wait at Maellard’s mansion and get a very important delivery.

Rigby must borrow his dad's car and return it unnoticed so he can drive Eileen to his school prom.

"The Dome Experiment" is back on again, and the guys are tasked to protect a large red button.

When Mordecai, Rigby, and Hi-Five Ghost accidentally destroy Muscle Man's favorite shirt, they have to replace it before Muscle Man finds out.

Being unaware that a Renaissance Fair is being held at the park, Pops believes he has been sent back to medieval times.

Pops tries to see a planet that only passes by every 25 years.

Benson has a crush on one of the Dome scientists, and he wants to sneak her a bucket of chicken wings so that he can ask her out.

Mordecai and Rigby are put on a 24-hour lockdown inside the Dome, but they want to sneak out and see one of their favorite bands.

Mordecai, Rigby, Muscle Man, and Hi-Five Ghost want to be VIP members at Cheezer's.

The duo deals with The Dome's scientists to help them search for Benson's car keys.

Rigby must write a speech for his high school graduation that will be broadcast on national TV. Meanwhile, Mordecai sinks into a depression over how Rigby is now more successful than he is, and the park workers finally find out the true intentions of the dome experiment.

After the events of "Rigby's Graduation Day Special" the Park guys and Eileen must formulate a plan to survive in space and how to live in it.

The crew have an encounter with "brobots" whose purpose is to serve others, but Mordecai and Rigby are suspicious of them.

After learning their true mission in space, the crew is excited to make history, but Benson still wants to return home.

Mordecai and Rigby volunteer to rescue a scientist's ex-husband in exchange for space creds so they can buy hover shoes.

Chance Sureshot loses his wallet and is enclosed in a robot's bubble until he can pay for his food. In order to free him, Mordecai, Rigby, Toothpick Sally and Recap Robot must travel to the Mantis Planet to get it back.

In order to get back at the Bush Station, Colonel Rawls hires Muscle Man to prank them.

When Pops continues to have nightmares of an extraterrestrial creature asking for his address, the gang tries to help him.

Mordecai and Rigby must stop an evil brain after Rigby releases it from a cage.

After getting dumped by Pam, Benson goes looking for French Fries ingredients with a female asteroid named Roxy.

Colonel Rawls puts Rigby through safety training by pairing him up with the unbearable Spacey McSpaceTree.

Mordecai and Rigby must go to court after accidentally creating a barrage of sounds on a planet completely inhabited by sensitive ears.

Mordecai and Rigby go to see Fist Pump perform at the Tree Station, but get stuck in a space elevator whilst traveling to the top.

Mordecai and Rigby have to beat the Space Bush station in a dangerous race.

Mordecai and Rigby try to avoid spoilers of their favorite show, but Benson wants to spoil it to get revenge on them for forgetting to vacuum the house.

A mysterious new enemy, Anti-Pops, is after Pops forcing everyone on the Space Tree Station to evacuate.

After escaping Anti-Pops, the gang make a quick stop to buy new beds only to encounter a bounty hunter who is after Pops.

Mordecai and Rigby's butts get swapped after playing with a teleportation machine. Over time, the swapping spreads to other features, so they enlist Muscle Man for help.

The Park crew encounter the Alpha Dome, the first dome sent into space. When the crew go to investigate they find that its inhabitants believe that it is 1690.

The guys gather in the house on the Dome and tell scary Halloween stories just like ol’ times, only this Halloween, the stories have an extra terrifying, science fiction twist. (1/2)

The guys gather in the house on the Dome and tell scary Halloween stories just like ol’ times, only this Halloween, the stories have an extra terrifying, science fiction twist. (2/2)

The gang must travel to an ancient VCR that will play a VHS tape, made of ice, so that they can learn Pops' origins.

Earl, an ancient sensei, begins training Pops for his fight with Anti-Pops, but Pops is not sure if he can or should go along with it.

Earl begins training Pops through the technique of the training montage which allows trainers to bend space and time while leveling up. Mordecai and Rigby use one of their songs to help Pops and end up trapping the Park crew in a montage.

The guys celebrate their first Christmas in space by opening presents, eating peppermint bark and telling Christmas stories. Benson wants the stories to be more Christmasy but the guys keep adding scary elements, which infuriate their boss. (1/2)

The guys celebrate their first Christmas in space by opening presents, eating peppermint bark and telling Christmas stories. Benson wants the stories to be more Christmasy but the guys keep adding scary elements, which infuriate their boss. (2/2)

Despite all of his training, Pops still does not want to fight, so he sets up a meeting with Anti-Pops to settle things peacefully.

The crew arrive on Planet Nielsen where they are reunited with the Guardians of Obsolete Formats and meet the Seer who has been watching them since the very beginning.

Before arriving at Lolliland, Pops becomes despondent due to his approaching battle. The crew then try to cheer him up by recording their memories.

The crew arrive at Lolliland early, so they set up traps for Anti-Pops. Things seem to go off smoothly, but Anti-Pops is unfazed by their futile attempts.

Allies from both sides rally together for the epic fight. However, Pops and Anti-Pops are once again at a stalemate. Mordecai and Rigby are forced to jump between the two factions.

Mordecai and Rigby relive the first episode, but soon realize that they need to help Pops. Pops realizes that he must reach out to Anti-Pops and finally saves the universe at the cost of his life. The entire park crew return home to their friends and family where they are seen growing up and moving on to better lives. 25 years later, the entire crew return and Mordecai and Rigby reflect on Pops' sacrifice. Regular Show ends with Pops watching the series on VHS and uttering one final "Jolly Good Show".