Stan dreams about trading places with the single, carefree Principal Lewis, and after his wish comes true, Lewis becomes the patriarch of Stan's family.
Usagi and friends go to a ski resort to participate in the Moon Princess Contest, unaware it's part of Kunzite's plan to eliminate the real Moon Princess.
Pops wants his friends to see his favorite planet, so the group head out to camp, but Pops gets frustrated when he can't use his telescope and trouble ensues.
Mordecai and Rigby want to see their favorite band play, but the head scientist places them on a 24-hour lockdown in the Dome, so they must find a way out.
Barney organizes a treasure hunt because Mel is in a bad mood, and the activity helps Mel focus on things to be thankful for, which makes her feel better.
Gumball develops a strange and unusual stutter, but his difficulty in speaking causes him to accidentally say something that offends his brother Darwin.
Anais makes a friend at school but her brothers are concerned, so Gumball and Darwin sneak a peek at Anais' diary and learn the relationship is one-sided.
When Bobert needs to know the meaning of love, the people of Elmore try to help Gumball and Darwin explain it by sharing what they each believe love is.
Gumball finds himself walking down the street with Hot Dog Guy going in the exact same direction, and things begin to feel more and more awkward with each step.
The Wattersons learn there have been several disappearances across Elmore, including a neighbor, so they investigate and find their evil turtle has returned.
Cassidy Williams and the gang are attacked by robots that are found to be coming from deep underwater, so Daphne enlists the help of friends with a submarine.
The Scarebear attacks Mayor Nettles and Sheriff Stone, so the gang investigates and discovers toxic lithium has been spilled in the woods, resulting in mutants.
A volcanic fire god causes trouble; a chef kicks Shaggy and the dogs from his restaurant in New Orleans; the gang encounters an ice monster in the Yukon.
Finn and Jake must learn why the citizens of the Land of Ooo have disappeared; Finn and Jake are excited to receive an invitation to attend a Halloween party.
Gumball and Darwin decide to do Tobias' chores to earn "good points" for an online game called Galatrek, but the points might not be as good as Tobias claims.
Parents disguised as criminals board the school bus to teach the kids a lesson after they skip school, but the plan backfires after the police show up.
On an average night in the city of Elmore, the Moon reveals the dreams and nightmares of the sleeping residents and shows their desires, fears, and weirdness.
Nicole believes that Darwin misses his life as a fish, so the family tries to reconnect him to his aquatic roots but soon realize it may be time to let go.
Gumball's friend passes out playing a videogame and the child's parents want to ban them if Darwin and Gumball can't prove they can also be used for good.
Gumball feels slighted when Tobias doesn't follow their high five with his usual butt slap and makes it his mission to get Tobias to give him a butt slap.
Mordecai takes every opportunity to spend time with Margaret, so when she has to go on a trip and needs a ride to the airport, he wants to take her himself.
Mitch has a deep love for his girlfriend Starla who has an equally intense love for him, so when he writes a song for her, he wants the world to hear it.
Mordecai and Rigby are big fans of the latest cop show, so they both decide to enter a donut contest where the grand prize is an appearance on the show.
Louise helps Tina train for an intense cheese-throwing fight; Bob and Teddy teach Linda the art of eavesdropping on customer conversations without being caught.
After the kids ask to host an open-mic night at the restaurant, Bob struggles to keep up with their enthusiasm as hidden costs mount higher and higher.
Peter brings home a new dog after an injury to Brian leads the family to worry that he may be getting too old, but the younger pup quickly runs afoul of Stewie.
Peter's boss sends him back to third grade to qualify for a promotion; Brian, Frank Sinatra Jr. and Stewie get together and open the coolest club in Quahog.
A strangely eccentric genius scientist and inventor, moves into the home of his daughter and her family and begins to strongly influence his young grandson.
After being welcomed with open arms into the home of his estranged daughter Beth her family, Rick tries to help out by giving Jerry a hand with the family dog.
Rick gets an idea that would give his family a solution to the problems they've been having, which would allow him the freedom to go on an adventure with Morty.
Rick buys Morty an alien sex robot from an intergalactic pawn shop that Morty impregnates and the offspring turns out to be an alien man-child bent on killing.
Genius Rick takes on all kinds of horrible creatures in his adventures, but this time Rick has to battle with the devil himself and Summer is not thrilled.
Grandpa Rick has encountered many unusual characters, but his recent encounter with a group of old associates from the past causes problems with Morty.
Usagi goes on a family vacation to the hot springs, where she is unexpectedly reunited with Mamoru, but Mamoru no longer remembers Usagi or even who he is.