Alan becomes extremely emotional when Walden redecorates the beach house.
Susan's longtime book agent and dear friend, Lonny Moon (Wallace Shawn), gets into financial trouble; Bree reburies Rex amid police suspicions.
Lindsay (recurring guest star SHANNON LUCIO) and Ryan grapple with their new relationship: Is Lindsay Ryan's step-aunt or his girlfriend? Meanwhile, Summer meets Zach's (recurring guest star MICHAEL CASSIDY) family, and it doesn't go so well. In the end it's an anniversary to remember as Sandy surprises Kirsten with a serenade at the Bait Shop. But Marissa ends up alone as D.J. (recurring guest star NICHOLAS GONZALEZ) leaves Newport Beach.
House notices strange symptoms in a fellow inmate at the East New Jersey Correctional Facility; a clinic doctor must decide whether to risk her job by helping House.
John tries to save a suicidal teenager; Sammy convinces a former addict to be an informant; Tang gets a visit from someone from her past; Lydia and Ruben investigate a home invasion.