Episode 1
Mordecai and Rigby must save the park after the rest of the gang are brainwashed.
Episode 2
Episode 3
Mordecai and Rigby want to stop Muscle Man from screwing with Thomas.
Episode 4
While on their drive to a Halloween party, Mordecai and Rigby tells scary stories to Benson, Pops, Skips, Muscle Man, High Five Ghost and Thomas.
Episode 5
Episode 6
Mordecai and Rigby want to prove to Benson that they can be judges at the pie contest.
Episode 7
Benson wants to prove that he performed a famous drum solo.
Episode 8
Muscle Man wants to hide his bald spot at all costs.
Episode 9
Pops wants to beat the milk challenge to prove he’s one of the guys.
Episode 10
Rigby has never been known for his upper-body strength, so when the park employees have to go into the doctor and get their physicals, Rigby has trouble doing even one pull up, and so he must find a way to do so or get fired.
Episode 11
The house is decorated, the guests have arrived and it seems like it's the season to save Christmas when the gang finds themselves faced with the task of destroying a present for Santa that has the potential to destroy them and the holiday.
Episode 12
Episode 13
It’s Margaret’s last night of freedom before she transfers to a new college. So Mordecai, Rigby and Eileen decide to surprise her with the biggest party of her life. What could possibly go wrong?
Episode 14
After Mordecai, Rigby and Muscle Man squander the fireworks that Benson had purchased for an upcoming event at the park, the three have to go and find more to replace them before Benson blows a fuse and they lose their jobs.
Episode 15
Muscle Man tries not to contact Starla for an entire weekend.
Episode 16
Benson eats a magical, deadly sandwich that Mordecai and Rigby bought, so the trio must travel with the restaurant's manager, Sensei, to find the cure.
Episode 17
Mordecai and Rigby want to reunite the band Adrenaline.
Episode 18
Muscle Man, Rigby and Starla are annoyed about Mordecai's awkward goodbye to Margaret so they try to get Mordecai to tell Margaret how he feels about her.
Episode 19
Skips intervenes to stop his cousin's bad jokes.
Episode 20
When Mordecai and Rigby meet a caveman, they decide to put his unique prehistoric physique to good use: chugging cheese! But could this caveman actually turn out to be a Neanderthal nuisance?
Episode 21
Mordecai and Rigby help their favorite '80s sitcom star, RGB2, escape from the studio lot and into the mountains so he can avoid starring in a revival of his show.
Episode 22
Mordecai and Rigby have to get rid of some geese that are causing problems at the park.
Episode 23
Mordecai and Rigby want to win the grand prize on a Japanese game show.
Episode 24
Rigby stains Mr. Maellard's expensive white limousine with a meatball sub, so the guys have to clean it before Mr. Maellard gets back from vacation.
Episode 25
Mordecai offers Margaret a ride to the airport.
Episode 26
Muscle Man wants a local radio station to play the song he wrote for Starla.
Episode 27
The guys enter a donut contest in hopes of winning a cameo on their favorite cop show.
Episode 28
Skips has to lower his stress for health reasons.
Episode 29
Thomas must save his brain after he chugs a slushy that freezes his brain.
Episode 30
Muscle Man tries to save his trailer after it fails a health inspection.
Episode 31
Mordecai plans to kiss Margaret at a meteor shower.
Episode 32
Mordecai tries to shake hands with Margaret's father.
Episode 33
The guys need to obtain a LaserDisc player in order to watch the director's cut of a cult classic.
Episode 34
Mordecai and Rigby have to rescue the golf cart from a bunch of rich people at a country club.
Episode 35
Benson must trust Mordecai and Rigby to help get him down a mountain.
Episode 36
The park employees want to give Benson a special mug.
Episode 37
Muscle Man wants to binge on his favorite foods before going on a diet.
Episode 38
The park guys must help Muscle Man to stop fighting in his sleep.
Episode 39
Mordecai and Rigby must save Benson from an evil party company.
Episode 40
Mordecai wants to ask Margaret to be his girlfriend.
