Ridgewood High is hosting the annual "Brain Olympics", and Joey is intent on forming a team in hopes of winning. Liv, in an effort to shed part of her girly image, convinces Joey to let her join the team. In competition, each team has to build a Rube Goldberg machine, but when Joey thinks she is not clever enough, Liv decides to build her own. Meanwhile, Maddie holds a yard sale to raise funds for the French Club's trip to Montreal, and a priceless childhood memory accidentally gets sold.

When Maddie fails her driving test and Liv needs help trying to get a part in a sci-fi play, they decide to switch so Liv takes Maddie's driving test and Maddie auditions for Liv. But when Maddie accidentally yells, "Bam! What!?" Joey and Parker realize it's her and not really Liv, and Liv wrecks the car during Maddie's driving test.

When the kids overhear their parents' conversation, they mistakenly believe they are moving.

Maddie and Karen take part in a historical society's annual mother-daughter weekend of pioneer living.

Maddie gets jealous when Liv's best friend from Hollywood visits and flirts with Diggie.

Liv tries to play matchmaker and help Willow win over Joey's heart at the school dance.

In order to get out of a mother/son pageant, Parker intentionally gets up to mischief to get detention. Meanwhile, Pete plays nurse when Liv and Maddie get sick at the same time.

Liv meddles with Diggie's "meet-a-versary" gift for Maddie and Parker concocts a new face cream for Karen.

During a neighborly feud with the Dippledorfs, Liv rekindles an old friendship with Holden Dippledorf. Meanwhile, Joey becomes fascinated with a new member he meets at his weekly Intergalactic Council meeting.

To raise her grade in Mr. Clodfelter's home economics class, Maddie must win the Plate Off and defeat the class master chef, Artie. Meanwhile, Joey convinces Pete to sponsor his made-up clubs at school.

Liv rallies together a band, The Dream, to compete in the upcoming Stevens Point Battle of the Bands contest. Joey and Artie form a band too, but they can't seem to agree on anything.

Liv and her band mates are stumped and can't agree on a theme for their new music video. They enlist Parker to shoot the video with his new camera and Diggie enthusiastically signs on to join his crew.

Ridgewood’s mascot has been vandalized, and the Rooney’s all become suspects. Meanwhile, Parker has the day off from school and gets into trouble at home with Reggie.

Casting is underway for Liv's co-star in "Voltage" and some familiar faces show up for the auditions. Meanwhile, Karen arranges a "cleansing ceremony" for Maddie to help her let go of her feelings for Diggie.

Joey invites three girls over to watch the "Lover's Comet;" Grandma Janice presents Liv with an award but something seems off.

Liv invites her “Voltage” director and crew over for the Rooney’s traditional Christmas Eve dinner but is forced to enlist Artie’s help to prepare the famed meal. Meanwhile, Maddie and Willow’s gift exchange takes a surprising turn.

When Parker gets bumped up a few grades, he starts attending high school with Liv, Maddie and Joey! The older siblings now have to deal with him being good at everything.

"Voltage" is taking up all of Liv's time, but when The Dream is asked to reunite for a fundraiser, Liv is determined to make it happen. Meanwhile, Maddie tries to figure out where to go to college.

With Diggie’s return, Maddie is torn between him and Josh. Meanwhile, Liv is asked to plan a wedding in under a week when Gemma and Johnny Nimbus decide to get married.

Liv realizes that Voltage is moving their set to Los Angeles and she must pick to either move to California with the show or stay home and go to college with Maddie. Joey finally realizes that he likes Willow back and he needs to tell her this before she leaves to California for training camp.

Joey's popularity at school is threatened when an old nemesis from Wisconsin returns and Maddie feels the need to keep a close eye on Parker's new friend.

Liv undergoes vocal surgery and is unsure if she'll ever be able to sing again, so Karen and Maddie call in reinforcements to help. Meanwhile, Parker and Val are surprised by their competition in the Mars Madness finals.