Maddie is named captain of the girls' basketball team just as the school principal announces he is cutting funding for the program. Determined to change his mind, Maddie voices her concern to the principal, only to realize her team has abandoned her. Frustrated with her lack of leadership skills, Maddie turns to Liv to help her earn the team's respect. Meanwhile, Parker and Joey are challenged trying to find a bevy of tarantulas that escaped after Parker brought them home from school unbeknownst to their mom.

After Liv realizes just how much Parker has grown up while she was away, she volunteers to supervise his sleepover in hopes of reconnecting with him. But when all her activities backfire and start to embarrass Parker in front of his friends, Liv has to up her game in order to impress her little brother. Meanwhile, Maddie and Willow work on a school project, and Joey and Pete go on a road trip to the Pastrami Palace that leads to a wild night of fun.

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.

Liv and Maddie try to plan their sweet 16 party but complications arise.

Maddie and Willow are excited to try out for the school's varsity softball team, but Maddie, the catcher, realizes that Willow, the pitcher, is in a slump because she can't stop thinking about Joey.

In an effort to help Maddie bring out her “girly side,” Liv gives her a pair of the most comfortable high heels ever made.

To prove to the skeptics that she is meant to star in “Space Werewolves,” Liv agrees to do all her own stunts, not realizing exactly how complicated they are. Maddie tears her ACL and needs surgery, therefore not being able to play in the championship or go to the Junior Olympics.

Maddie is recovering from her knee injury and decides to take up a new hobby. Meanwhile, Karen asks Liv for advice on dressing cool, which results in a mother-and-daughter fashion face-off.

A magical amulet turns the twins into triplets, producing a frightening sister named Helga; Joey and Parker use the amulet to clone themselves.

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

When Liv is offered the lead in a basketball movie, Maddie and Willow volunteer to transform her from a clumsy athlete to a basketball pro.

Liv, Maddie and their friends confront a fellow schoolmate who has been giving them numeric ratings based on looks.

Liv is filming the "sequel" to the muffler commercial she did when she was six. Meanwhile, Maddie is feeling nervous about her knee as she prepares for her first game back.

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.

Liv and Holden share a special moment as they rehearse for an upcoming performance. Meanwhile, Reggie ditches Parker for a chance to play basketball with Maddie.

Before he leaves for Australia, Diggie needs to tell Maddie how he feels. Meanwhile, Parker, Reggie and Evan swear they will remain on the couch until the new season of Linda and Heather is released.

Maddie and Willow join in on the Senior Scare, in which high school seniors scare middle school students; Liv and Joey head to New York.

Liv tries to help her new co-star Josh feel more comfortable in Stevens Point while the rest of the school prepares for Cowbell Week, a Stevens Point tradition.

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

When Willow earns a scholarship that Maddie really wanted, the besties get into a huge fight. Then, when Joey accidentally breaks Liv's toe and tries to make things better, he ends up making it even worse.

Liv gets upset when an interview focuses on her appearance instead of her acting. She enlists her friend Kristen Bell to help her change the conversation. Meanwhile, Maddie must hunt down a lost library book or else she won't get her final grades.

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.

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.

"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.

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.

In the season three finale, Liv and Maddie get into a big disagreement while trying to figure out if they'll be together for the next four years or be going their separate ways.

Liv lands a small part on the hit show "Linda and Heather," but her role turns out to be bigger than she could have ever imagined. Meanwhile, Joey has to deal with his relationship woes.

Liv and her fellow female co-stars of "Sing It Louder!!" attempt to break the stereotype that boys are better than girls at 'boy stuff' by organizing a woodblock derby race against the boys. Meanwhile, Maddie and Willow take part in a challenge at their local restaurant which has only been won by men before.

When Maddie and Willow discover that one of their acquaintances is homeless, they set out to help him. Meanwhile, Karen gets discovered by a modeling agent, and Joey and Parker attempt to sneak into a movie.

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.

After exciting opportunities arise for each of the Rooney children, their summer plans are thrown into jeopardy.