Cristina and Burke's wedding day arrives - along with the interns' first exam results - and a successor to the Chief is named, as Callie and George make a big decision about their relationship.
Jess reluctantly dates the wealthy father of one of her students. Meanwhile, Nick attempts to buy a new cell phone and Schmidt and Winston get ultra-competitive playing bar trivia.
Edison Davis introduces the worried parents of a missing college student to Olivia. Their daughter has been writing a racy blog about her exploits in the bedrooms of Washington DC's political heavyweights.
Violet and Cooper make amendments to their friendship in order to please others, Pete and Cooper get in an argument involving marijuana use by a patient and Addison is conflicted about going public with her new romance.
Old wounds are reopened when the retired lead detective on Beckett's mother's homicide case contacts her with new information, but then is gunned down right in front of Beckett before he can tell her what he knows.