The family begins planning their vacation when George gets invited to film a whale documentary in Costa Rica. Meanwhile, Barbie commits to a summer job.
Ahead of the show's first rehearsal, Barbie is put in charge and struggles with her role as the boss. In Costa Rica, the girls search for a secret cave.
As the girls look for a missing mermaid in Costa Rica, Barbie attempts to shut down a party at her house and embarks on an underwater mission with Ken.
The Roberts go on an impromptu adventure. Barbie and the gang investigate an oyster scandal involving Mr. Pearlman as the show's opening night arrives.
With rocky starts to the school year, Barbie reunites with a competitive old friend and Stacie tries to stand out on her own. A massive mess erupts.
As Barbie takes a shot at playing basketball for the first time, Chelsea joins the soccer team. Later, both sisters learn a lesson in never quitting.
Auditions to play at the school dance heat up as Barbie tries to navigate mixed feelings about Ken needing help to ask out another girl.
When Margaret considers a promotion at work, Barbie and the girls think up ways to show her she has the family's support. Chelsea hides a furry secret.
When George asks Barbie to hold Margaret's anniversary gift, she misplaces it in a jacket, sending her and Skipper on a wild hunt to track it down.
Trey stays with the Roberts when his parents forget to bring him on a cruise. Barbie feels left out when her friends start bonding with Skipper.
The Roberts participate in Malibu's Family of the Year contest against the Reardons, who have won the title for a decade, as surprises start popping up.
Barbie and Skipper team up for a massive community service project involving the water park, but Skipper is distracted with a different priority.
After an earthquake hits and impacts the neighborhood library, Barbie and Skipper find renewed purpose and a greater sense of community.
Barbie and her friends participate in a competitive scavenger hunt against their high school's rival, Empire Coast High.
With Barbie's family craving her delicious brownies, everyone becomes a suspect when they go missing on the first night of their camping trip.
Barbie and Ken find themselves hanging out with a new set of friends when Trey and the Dudes get into a fight.
After accidentally crashing the camper, the girls spend their sisters' day out by entering a reality competition show to win prize money.
Determined to become the better version of Barbie, Tammy imitates Barbie in many ways until a situation lets Tammy's personality shine through.
When circumstances prevent Barbie from taking Chelsea to her first circus, Barbie brings the big top to the Dreamhouse.
Barbie and her friends spend spring break in the Windy Willows, where a spooky ghost awaits.
After catching a cold, Barbie tries to squeeze in rest but a science presentation and her zany dreams make her feel restless instead.
A masked marvel on the ice, Trey tries to keep his skating talents a secret as Barbie convinces him to perform in the ice show.
While working on a song, Nikki gets caught in the middle of Barbie and Teresa's creative differences. Skipper and her pals start a babysitting business.
With Barbie's parents away, the Dreamhouse turns into a haunted house when she volunteers to host her friends for Halloween.
Tammy tags along for the girls' camping trip to prove to Trey and the Dudes she can fit in with Barbie and her pals.
As Ken searches for a Christmas gift for Barbie, Barbie comes up with a plan to get Ken the perfect present.