Now that Dave's moved out, Alex starts looking for a new roommate with help from her sister who doesn't think she's a very good judge of people. Not quite ready for a new relationship, Dave gets more than he bargained for when his one-night-stand evolves into "chicksand".moreless
Carli mistakenly hits on her boss while an old friend from high school comes back to fulfill a promise they made to each other to get married if they don't find anyone else.moreless
Billie and Zack attend separate parenting classes due to a conflict in their schedules. Accompanied by Olivia and Abby, Billie faces competition from her sister who does better in the assigned tasks.
Gibbs is forced to dig into the past when a murder of a Marine and his two friends turns out to be linked to past issues. Meanwhile, Gibbs faces a tough challenge as he holds Ziva's fate in his hands.moreless
Katie's ex-boyfriend Ben invites everyone to a Trash 'N Treasure party where you have to bring an ex in hopes of meeting someone's ex. The Roommates all go, but things begin to become strange once everyone meets up with their ex.moreless
The team members try to identify a stalker before he can attack a woman who is being stalked in Silver Spring, Maryland. Meanwhile, Hotch and Rossi are called as consultants on a possible battered woman syndrome murder case in Boston.moreless
The rest of the gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is derailed when Sheldon declares he'll be the one to decide who can date her.
Legendary jazz musician John Henry Giles is checked into the hospital and when he's told he's dying from ALS, he signs a DNR to avoid a slow death. House disagrees with the diagnosis and goes against everyone's wishes when he violates the DNR to save Giles' life. The decision lands House in court, drives Foreman to consider taking another job, and results in Giles' paralysis worsening. But when the patient inexplicably starts getting better, the team has to figure out the mystery in reverse and find out why his condition is improving. Meanwhile, Dr. Foreman meets with an old friend who offers him a West Coast partnership.moreless