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90210: One Party Can Ruin Your Whole Summer
A post-prom party is being held at Naomi's home when she has a fit after walking in on Liam and Annie and makes accusations which has Annie at her breaking point. Meanwhile, Brenda visits Adrianna at the hospital as she deliver her baby, and a fight occurs between Dixon and Ethan over Silver.
This is the last episode to feature Matt Lanter as Liam McCourt in a recurring role, he is promoted to season regular from season two.
Ryan Eggold does not appear as Ryan Matthews in this episode although is still credited.