While Joey and Maddie try to catch Diggie before he departs for Australia, Liv covers for Maddie at home. But when Diggie shows up at the Rooney house, chaos ensues, reminding Parker of his favorite soap opera drama. Meanwhile, Liv gets a call from her manager telling her she landed a coveted role in a new TV show "Voltage.".
Maddie enlists Liv's help to build a giant Paulie Porcupine head for the Homecoming parade, but Joey and Parker accidentally destroy it while playing around with a stunt-prop from Liv's TV show, "Voltage.".
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.
Maddie and Willow prepare for "Senior Scare," a Ridgewood tradition when high school seniors scare middle schoolers. Meanwhile, Liv falls into a precarious predicament with a photographer, and gets fans Cyd and Shelby ("Best Friends Whenever") to help pull off a flash mob to create a diversion.
Liv tries to help her new co-star feel more comfortable, so she starts introducing him to her friends.
Grandma Janice shows up to present Liv with an award, but Liv begins to suspect that something isn't right. Meanwhile, Joey invites three girls over to watch the "Lover's Comet."
Willow earns a scholarship that Maddie wanted and the two have a huge fight; Joey accidentally breaks Liv's toe and makes things worse when he tries to help her.
When an interviewer focuses more on Liv's appearance than her acting, she enlists the help of her friend Kristen Bell in hopes of changing the conversation; Maddie has to hunt down a lost library book.
Liv invites some of the crew home for Christmas; to her surprise, she learns mom never used to cook the holiday dinner and decides to cook the festive feast herself.
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.
A new coach arrives to take charge of the girls' basketball team and immediately butts heads with Maddie. Meanwhile, when Liv agrees to help Parker with his art project, her date with Holden takes an unexpected turn.
Joey and Parker hold strong beliefs that the Voltage set is haunted; Josh finds an excuse to spend time with Maddie.
When Liv needs to learn French for an upcoming interview, her mom decides to immerse her in the language and culture. Meanwhile, Maddie is thinking about dating again.
"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.
Maddie and Josh go on their first date. Liv and Holden try to help Parker pass his show choir class.
A reporter mistakes Maddie for Liv while she's on a date with Josh. Maddie doesn't want Diggie to hear the news from the press, so she asks Liv to play along.
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 is not too happy when Joey lands a part on "Voltage." Meanwhile, when Karen finds out that Andie's dad, Mr. Bustamante, disapproves of Dump Truck, they team up to change his mind.
Liv must choose between moving or staying in Wisconsin with her sister when ``Voltage'' relocates to Los Angeles.
Liv and Maddie getting into a big disagreement while trying to figure out if they will be together for the next four years or be going their separate ways.