Susan Merson

Tragedy strikes when Derek loses a pregnant patient with an aneurysm during surgery and Addison must deliver the premature baby; Izzie learns she does not have anemia as she first thought, but something much worse.

Derek searches for the best way to propose to Meredith; Callie tries to convince Mark not to blow his chance at real love with Lexie, despite his fear of Derek finding out; Izzie learns she has anemia.

A college football player collapses in the heat of practice and his death haunts Nate with his AVM secret. With Matt Gilardi failing to buy out the resilient Fishers, Kroehner's regional director decides to take matters into her own hands.

A Hispanic female, shot in the head and suspected of being a prostitute, turns out to be a prison corrections officer.