90210 - Season 4 (2011)

Navid surprises Dixon with some studio time to apologize for messing things up with a music producer, where Dixon feels the pressure to create a hit song. Naomi plots revenge to take down rival Holly (guest star Megalyn Echikunwoke) and her sorority during the Greek games, which requires Austin's (guest star Justin Deeley) help, much to Naomi's dismay. Silver directs a disastrous commercial for Liam's bar, while Ivy feels torn between her relationship and her friends.

Silver is asked to make campaign videos for political candidate Marissa Harris-Young who is running against Teddy's Uncle Charles for public office. Teddy runs into an old flame and Annie gets stuck with Leila during an important date. A surprise visitor threatens to tear Liam and Jane apart, while Naomi can't shake her growing feelings for Austin during a party to encourage students to vote.

Liam gets offered a modeling job after an agent sees the commercial for his bar, while Annie finds herself starting to fall for an unlikely guy. During a charity talent show event to raise money for an experimental cancer treatment for Raj, Naomi is determined to win the contest in order to show up Austin's out-of-town visitor Sally. While working on his music, Dixon pushes his limits and starts spiraling out of control, which forces Adrianna to confront him.

Naomi has to work with her arch-nemises Holly to throw a campus costume party, leading to unfortunate consequences. Navid's plan to bring down his Uncle Amal is threatened, while Silver discovers that political candidate Marissa Harris-Young is not who she seems. Meanwhile, Adrianna handcuffs herself to Dixon in an attempt to get him to stay sober and Annie must decide if she wants to give Patrick another chance.

Silver's video of Teddy's Vegas wedding is leaked to the press, and has damaging effects on his uncle's campaign. Liam's modeling career is taken to the next level by Shelia and Annie is determined to help Dixon, even though the help he needs comes at a high price. Meanwhile, Ivy and Raj decide to plan for the future.

Silver's video of Teddy's Vegas wedding is leaked to the press, and has damaging effects on his uncle's campaign.

Dixon tries to pursue a relationship with a resistant Adrianna, while Ivy and Raj's arguing takes a toll on their relationship. Liam plans a holiday dinner for the gang, and an unexpected guest shows up. Meanwhile, Naomi goes to extremes to prove her love to Austin.

Dixon struggles with temptation as he tries to make his way back into the music world, while Annie confronts Jeremy, who stands in the way of her inheritance. Naomi and Holly embarrass themselves in front of Janice Dickinson at a fashion show, while Navid reaches a breaking point with his uncle. Meanwhile, Teddy makes a big decision that upsets Silver.

Naomi is asked by her new party planner boss Rachel to oversee her arch-nemesis Holly's birthday party, while Annie breaks into Jeremy's apartment in a desperate attempt to get the proof she needs to keep her inheritance.

Naomi embarrasses herself in front of her boss Rachel in an attempt to get over her break-up with Austin.

Naomi is determined to fix the relationship between her boss Rachel and her daughter Holly, which forces Holly and Naomi to work together. Greg asks Silver to move to New York with him and Navid finds out some shocking information about Greg's daughter. Annie discovers Liam's girlfriend Vanessa might have been involved with his motorcycle accident.

Annie has to make a decision that could expose her work as an escort when Dixon gets arrested in connection with a fire at a sorority house. Adrianna and Silver attempt to put their past behind them, which results in disaster for Silver's relationship with Greg. Vanessa helps throw a party to re-launch Liam's bar, where the All-American Rejects perform.

In an effort to put her inheritance to good use, Annie volunteers to organize a big charity fundraiser.

Naomi's sister Jen arrives with her son for a surprise visit. Adrianna and Dixon land a meeting with a major movie producer to discuss music on his next film, but are sabotaged by Vanessa. Meanwhile, Silver gets accepted into New York University and Ivy attracts attention in the underground scene when she switches to a less conventional style of art.

Naomi is convinced that Annie's new business partner P.J. is the perfect man for her, but discovers her sister Jen is also interested in him.

Dixon collapses while arguing in the recording studio with Adrianna. (guest stars include Manish Dayal and Robert Hoffman)

PJ proposes to Naomi and Annie discovers he needs to get married in order to get the rest of his trust fund. (Nick Zano and Arielle Kebbel guest star)

Naomi's friends worry that she is rushing to get married, so Naomi and P.J. (guest star Nick Zano) decide to throw a small party so everyone can get to know him.

Navid suspects that Liam and Silver hooked up so he decides to confront Liam on the red carpet of a movie premiere. (Guest stars include Robert Hoffman, Justin Deeley and Billy Ray Cyrus)

Naomi shocks everyone when she announces she won't be able to oversee Max's wedding because she has accepted a job in New York and will be leaving immediately.

Naomi shocks everyone when she announces she won't be able to oversee Max's wedding because she has accepted a job in New York and will be leaving immediately. (Guest stars include Josh Zuckerman and Trevor Donovan)