When a guilt-ridden Barney breaks the "Bro Code", he struggles with the ramifications of his misstep.
Izzie's mother arrives at Seattle Grace; Meredith and Lexie receive a visit from their apologetic father; Meredith and the Chief argue about a case.
When a fire breaks out in Stella's apartment, the CSIs investigate and determine it was arson.
Nick and Eddie head to New York in an attempt to bring Owen back to his estranged wife and family in Knightsridge, and Hannah comes to terms with her true feelings for Nick.
When Aubrey's unwelcome father visits, Nick is forced to face his relationship with the Commander and with Sam. Upon learning that Alison is entering the dating pool, Owen is set up on blind dates by his friends.