The O.C.: The Shape of Things to Come

A petition circulates among the Harbor School parents to expel Marissa and Ryan because of the shooting and Dr. Kim brings in a new Dean of Discipline to handle the matter. Dean Hess decides to expel Marissa. Kirsten decides to join Charlotte at her Lake Arrowhead retreat instead of going directly home from rehab. Jimmy tries to fend off a very large debt and asks Julie to re-marry him. Summer faces off against Taylor Townsend for social chair when Taylor steps into the void left by Marissa. When Dean Hess tries to physically remove Marissa from the kick-off carnival, Ryan attacks him and is then immediately expelled from Harbor as well.