90210

On their first day at West Bev, Annie and Dixon encounter Ethan, the star lacrosse player she met a few summers ago; Naomi, the spoiled rich girl whose sole focus is her Sweet Sixteen party; Silver, the free-spirited girl who later gossips about Annie on her blog, and Navid, editor of Blaze News.

Annie and Dixon's Friday night plans come to a screeching halt when they learn that Harry and Debbie have planned a family bowling night.

Harry reveals that West Beverly's theater director is no longer able to direct the school musical, "Spring Awakening," prompting Tabitha to offer her services as the new director, much to Annie, Harry and Debbie's surprise. Tabitha's approach with Adrianna doesn't go over well, so Kelly convinces Brenda to take over as guest director of the play.

As opening night of "Spring Awakening" nears, Annie and Ty have had a chance to spend a lot of time together and Ty reveals his plans for a one-on-one after-party in his hotel room. Harry catches Annie and Ty kissing backstage and later he and Debbie express their concern for how fast Annie's relationship is progressing.

Brenda, Kelly, Ryan and Harry confront Adrianna about her growing problems, but Adrianna denies being on drugs. When Debbie is given the opportunity to shoot a fashion show for Nylon magazine, Annie decides to use the fashion show as part of her class assignment on careers.

Annie and Ethan are paired up to take care of a baby as part of a class project and the experience causes them to see each other in a new light. Silver and Dixon continue to get closer and during her half-birthday party at the Hollywood Forever Cemetery, she opens him up to an entirely new experience in public.

Annie prepares for her driver's test and works out a plan with Ethan so they can attend the Homecoming dance without officially making it a date. Adrianna confesses about her drug use, effectively clearing Naomi's name, and is forced to check into rehab for her addiction.

Harry and Debbie inform Annie and Dixon about Harry's son that was given up for adoption nearly 22 years ago. While Dixon doesn't seem bothered by the information, Annie releases her frustration and anger at a sleepover with Naomi, Silver and Adrianna.

Upon seeing Annie and Ethan kissing, Naomi decides to take matters into her own hands to get back at Annie for her deceit. The students are in shock about the news that Ryan hooked up with one of the students, Kimberly, and that he has taken a leave of absence.

Still in shock from the surprise arrival of their half-brother, Sean, Annie and Naomi put their arguing aside long enough to process the news. Harry and Debbie also deal with Sean's arrival by welcoming him into their home.

When Debbie, Harry, Annie, Dixon and Sean spend the evening playing games, Annie overhears a phone call with Sean that raises suspicion. Adrianna invites Brenda to attend a support day at her rehab center, but the day quickly turns upside down when Adrianna learns information that will cause her life to change forever.

When it comes to parenting, Debbie and Tabitha don't see eye-to-eye and their personalities continue to clash when Tabitha surprises Annie and Dixon with a new car. Ethan and Annie sneak away to Tabitha's house in Palm Springs for some alone time and take full advantage of being on their own.

Adrianna comes to terms with her decision about her baby and leans on Naomi and Kelly for support while also revealing the baby's daddy. Ethan helps Annie rehearse her lines to prepare to audition for the new school play and both are taken back when they learn that Ty is also auditioning.

Adrianna reveals her pregnancy to the baby's father and is shocked by his parents' handling of the situation. Naomi stands by Adrianna's side while they devise a plan to break the pregnancy news to Adrianna's mother, Constance.

Naomi, comfortable with her new living situation, is immediately taken by Liam, a hot bartender at her hotel. Sparks begin to fly between the two but Naomi is confused by the mystery that surrounds Liam.

In an attempt to get close to Liam, Naomi offers to be his math tutor, but she gets more than she bargains for when he takes her out for a wild night. Silver takes a class assignment a little too far when she creates a video that documents her love for Dixon.

On a very special 90210, Ryan attempts to calm Silver down after reactions to her video, but she disappears before he can help. Dixon reveals the situation to Debbie and Harry, who are shocked at the details and confront him about not seeking their help sooner about Silver's behavior.

Kelly and Silver are surprised when Donna shows up at their door, straight off a plane from Japan. Annie and Dixon decide to spend their spring break on a road trip to visit someone from Dixon's past, while Ethan decides to step out of his bubble and volunteer with Habitat for Humanity.

Harry and Debbie have finally sold their home in Kansas and prepare for a Beverly Hills-style yard sale. Donna reveals details of her separation to Kelly, and the two search for locations so Donna can open a clothing store in Beverly Hills.

Navid and Adrianna fantasize about their future, but when they tell his parents about their decision to spend the rest of their lives together, things don't go as they planned. Silver and Dixon adjust to her new school, while the Wilsons are dealing with having Naomi as their new house guest.

Adrianna and Navid announce plans for their future to their friends but don't receive the reaction they were hoping for. To support their friends, Naomi, Annie and Silver throw Adrianna a bridal shower, while Dixon, Ethan and Liam surprise Navid with a bachelor party at a burlesque club.

West Bev's Hollywood-themed prom is full of surprises, but first Harry warns his students that any non-school sponsored parties after the prom will be met with serious consequences. Naomi learns that Jen has maxed out her credit card to furnish their new home, but soon forgets her problems when Liam asks her to the prom.

Adrianna and Navid spend their prom night in the delivery room and Brenda shows up to offer support. Naomi and Liam have revealed their honest feelings for each other and she decides to host an after-prom party at her new house, much to Jen's disapproval.