Merian tries to save Dr. Lullah's poor fish counter from a life of busy work; the kids put on a stage play to warn the mutants of an incoming disaster.
Mabel befriends a Merman that is trapped in the deep end of a public pool, leading her to find his family in the ocean, even if it means their romance will end.
After he freezes in the face of danger, Remy embarks on a journey to become a martial arts warrior who will take action; Cricket's dirt jar goes missing.
Cricket learns how to drive a tractor while Remy searches for his "country grit"; Gramma and Gloria visit a club; Phoenix heads back to Big City for Saxon.
Billy and Nancy get ready for a special harvest dinner; Tilly aspires to win a trophy at the local community center and trains with the center's director.
The children sneak into Bill's truck when he goes out one night with a strange duffel bag; Cricket makes an impulsive decision to purchase a large pet snake.
Cricket convinces the family to visit a big-box retail store to get a good deal on a new television; Tilly befriends a cat that patrols the neighborhood.
Tilly and Gramma become tourists for an entire day; Cricket and Remy organize a special introductory dinner party for people to get to know one another.
Cricket invites some local news teams to witness the growth of Bill's large watermelon; Cricket confronts a group of cyberbullies known as the Cyber Knights.
Tilly says that she saw stone gargoyles coming to life to impress her friend; Cricket strikes a deal with a chain of grocery stores to sell Bill's produce.
Cricket decides to spend his first tip by purchasing a toy fish; Cricket's family spends their first night at a hotel after Gramma kicks them out of the house.
A 10-year-old boy tries to impress his new neighbors by sending a chicken into space; the young boy mistakenly misplaces his family's steaks on the subway.
Cricket is challenged to a high-dive jump when his family goes to an indoor pool; Tilly claims their goat has a dog's spirit so it can compete in a dog show.
Bill and the family's road trip to visit the country is interrupted by traffic; Tilly cares for eggs and hopes the chicks will imprint on her as their mother.
Cricket and his family prepare to make a big move from the country to Big City to live with Gramma; Cricket and Bill discover a nest of raccoons in the garage.
Pliny tries to keep a promise she made when a bunch of kids start playing with a strange diorama; Sara feels guilty for conning Larry out of his beans.
Perry tries to get away from a dangerous Australian platypus hunter who is trying to get rid of him while also helping Dr. Doofenshmirtz from ruining his life.
Candace comes up with a special plan to find new spots for she and Jeremy; Phineas and Ferb try to help locate Pinky by creating a new device for Buford.
Beck races to destroy the Occupation manned energy drill before it ruins the Grid and Argon City; Zed and the others compete in a light race under the tunnels.
Kiff and Barry accidentally cause a townwide blackout by upsetting a Lighthouse Keeper; Kiff has dinner at the Buns's and has to hide that she hates the food.
Bucky transforms the school into a Bucky-themed dystopia; Bonzo finds mysterious blueprints in the diner and then decides to construct a Spaghetti Waterfall.
Kiff regrets her decision to see the inside of the faculty lounge; Kiff wants to retake her career test, so she tries to fail at being Helen's assistant.
Phineas and Ferb find a capsule that has landed in the backyard; the brothers create their own model solar system, and Doof holds a seminar for other inventors.
A future version of Phineas must choose a college to attend, a decision which is complicated by the revelation that someone he knows has a crush on him.
Zed and his pals discover that the new mini fridge they found is too small for them to all share; Bree deals with a negative comment that erodes her confidence.
Tilly borrows an alien chemical from Gwendolyn Zapp to make Bill's pumpkins larger, but the chemical causes them to transform into body-snatching monsters.
Beck races to destroy the Occupation manned energy drill before it ruins the Grid and Argon City; Zed and the others compete in a light race under the tunnels.
Dipper finds secret pages in his journal that lead him and the gang to find the author of the entries, taking them to a hidden bunker and a figure of lore.
Phineas and Ferb reconstruct one of Doofenshmirtz' failed inventions when it lands in the yard; the boys discover the lost underwater city of Atlantis.
When they leave their skateboard at their grandparents, the boys build a teleporter; Candace convinces Jeremy to be her partner on a television dance show.