Andi and Walker realize how much they have in common when they spend the day together. Buffy steps up to lead the team in T.J.'s place when he is side-lined.

After much preparation and planning, Cyrus’ Bar Mitzvah festivities commence. Andi and her friends and family all join him in the celebration, which is full of landmark events for more than just Cyrus.

Andi and Bex plan a special dinner for Bowie, but unexpected company drops in to crash the party.

Andi's world turns upside down when her older sister, Bex, returns home on her 13th birthday and reveals a family secret.

Bex throws Andi a house party!

Bex helps Andi stand up against the new dress code.

Amber fails to defend Jonah when her friends mock him.

When Andi and Celia spend more time together, Bex feels jealous; Buffy agrees to tutor TJ if he agrees to pass her the ball on the court.

Andi and Jonah go on their first date where she learns some sad news. Bex and Celia prepare for the grand opening of their business.

Andi decides to keep the news about Bex from her friends.

Andi encourages Bowie to plan a future with Bex; Cyrus introduces his girlfriend, Iris, to Andi and Buffy; Jonah invites Andi to the Space Otters' party.

Andi takes a stand when students are divided into two groups, and one group receives preferential treatment at her school. Andi also learns AndiShack is in jeopardy.

Jonah tries to express his feelings for Andi through gifts, which proves not to be his forte. Buffy reveals she has to move, and Andi devises a plan for her to stay.

A special craft project goes missing when Andi agrees to let Miranda’s daughter spend the day at AndiShack. Jonah confides in Buffy and Cyrus.

Andi, Cyrus and Jonah put together a farewell gift for Buffy before her last day in Shadyside.

Bex and Cyrus have news for Andi.

Andi must adjust to Bowie being in her life full time.

Andi and Bex discover that Bowie may be seeing someone; Cyrus is selected to make a video for the school, but realizes he may be better behind the camera.

Andi runs into Walker at an art fair, and he meets Jonah for the first time. Bowie’s relationship with Miranda hits a snag.

Jonah asks Andi to help him pick out a gift for Amber.

Andi and Bex adjust to their new living arrangement.

Andi invites Jonah to her Chinese New Year celebration, which gets awkward when Celia’s sister Aunt Mei visits. Buffy signs up for the boys’ basketball team tryouts.

Andi learns more about her past on the anniversary of the day Bex left home. Jonah attempts to teach Cyrus how to skateboard.

Andi questions her relationship with Jonah; after a discouraging talk with Amber, Andi enlists Buffy and Cyrus to investigate.

Jonah finds a way to tell Andi how much he truly likes being around her; Walker continues to make a positive impression on Andi and her friends.