Denny needs a heart or else. Izzie and George go crazy trying to get him one. Derek has the life of a friend in his hands as he operates on Burke who has been shot. Burke cannot operate on Denny after Denny's heart stopped and now Denny is in a dire condition. Cristina gets put in charge of the ER and she is worried about Burke.rnrnRichard tries to get information from Addison about a family member's condition. Callie and George have a talk about his feelings. Meredith and Derek have a talk about Doc.rnrnPart 2 of a three-hour season finale. This episode is the first hour of a two-hour episode which is two hours long and will air on a Monday in a different time slot than it would on Sunday. Aired on Monday, May 15, 2006 from 9 PM EST to 10 PM EST.