Wishin' and Hopin'

With Izzie's inheritance money, Bailey and Izzie open the Seattle Grace free clinic and eagerly wait for their first patient. The lives of the doctors are put at risk when a patient's blood is found to be toxic. Meredith, Cristina and Izzie volunteer to risk their lives to save the woman after Derek and Burke's air-tight suits run out of battery. Meanwhile, Ellis, Meredith's Alzheimer's-stricken mother, has a change in her condition; George and Callie return to the hospital with surprising news; and Cristina gives Burke an answer to his proposal.