Kiff wants to be the second kid in town to mow her own lawn after Reggie becomes the first; Barry and Kiff set out to bring Harry back after he runs away.
Vanessa and Dr. Doofenshmirtz discover a secret room that is filled with souvenirs Norm has collected from the adventures he has had with the evil scientist.
Phineas and Ferb provide Candace with a box of items to keep her boredom at bay when she is stuck in bed; Phineas and Ferb construct a truck stop diner.
Phineas, Ferb and their friends construct a huge version of a childhood game, using Danville as the central location; Candace cannot decide what to do.
When Ferb's cousins arrive from England, Phineas and Ferb challenge them and their friends to a soccer game; the boys build a three-dimensional soccer field.
Cricket secures a place to appear in Big Coffee's upcoming television commercial; Bill struggles to adapt after he trades his old pickup for an electric car.
Dan learns that Mia is hiding her brawling identity from her parents, and Mia discovers that Dan visited the Dragon Clan Mod; Dan challenges the Insect Clan.
The Pines family seeks a return to a normal life following the Li'l Gideon incident by hosting a "Mystery Shack is Back" party but receive unwelcome guests.
Kiff discovers the burdens of leadership while leading a group to the mall for free pretzels; Kiff and Barry hope to learn about the mysterious Ghost Wolf.
Doof steals shrunken goods as the Flynn-Fletchers go on a cruise; Doof renews his evil business license, and Isabella tries to lead the Fireside Girls.
Zed and Addison use A-Spen's alien time warp technology to redo their senior year so they can spend more time with their pals; Zed creates a new drink.
Wynter and A-spen try to get on the same page after they start their own band; Wyatt wants to woo Eliza, so Willa and Bucky create an alpha-dog boot camp.
Lilo finds the pod for Experiment 509, a plant experiment, and wants to trigger it to find its true place, but Jumba won't allow her to do so & locks it up.
Nani is having trouble paying the mounting bills resulting from Stitch's poor behavior and if Stitch continues to act up she may be forced to give him away.
Tater attends a festival celebrating Latinidad and tries to fit in; Tere and Toñita express their appreciation for their big sister Tabi with help from Tater.
Kiff and Barry deal with annoying people as they try to relax at the beach; Barry's sunburn threatens to jeopardize his plans to see the sunset with Kiff.
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 Dipper locates a secret room inside of the Mystery Shack, Mabel decides that she wants to use the are too, and the pair challenge on another for it.
Impressed with Experiment #458's ability to find anything, Lilo takes him to school for show-and-tell, upsetting Mertle who does not like losing the limelight.
Phineas and Ferb create their own language, and it catches on quickly; Candace is puzzled when she finds everyone speaks a language she does not understand.