Regi Davis

While undergoing aggressive cancer treatment, Izzie focuses on planning Meredith and Derek's wedding; Callie's father visits; Owen seeks help with his PTSD.

All reassess their personal lives after witnessing a chance reunion between two long-lost lovers in the emergency room; Karev treats a troubled teen (Demi Lovato); Meredith shares her suspicions with Cristina.

The team pursues a serial killer in Milwaukee, with three fewer members since Hotch asked to be transferred, Prentiss quit, and Gideon is missing.

Michael is so smitten with Gob's girlfriend that he decides to let her know that Gob has been cheating on her, and Lucille tries to break up Buster and Lucille Austero.

Lilly won't let Miley pay for her class trip to Washington and instead has a sale to raise the money.

After learning that his father is in prison for doing business with the old Iraqi government, Michael decides to wash his hands of the whole family and leave town for good.