- 90210 celebrates its 100th episode this week.

- The crew returns for a West Beverly alumni event.

- Guest stars include Denise Richards and Taio Cruz.

- Jasper and Cousin Emily make a comeback.

- Liam confides in Annie about the harassing calls and Vanessa.

- Max gets ousted by the board of his company.

- Dixon finds out about Adrianna's infidelity.

- Vanessa is alive.