In the first half of Grey's Anatomy's two-part Season Two finale, Christina (Sandra Oh) is placed in charge of the ER just as several tense situations reach the crisis stage. It looks as if heart-transplant candidate Denny (Jeffrey Dean Morgan) won't survive the night unless George (T.R. Knight) acts quickly; Derek races against time to safe the life of gunshot victim Burke; and Webber (James Pickens Jr.) tries to make a dying girl's dream come true--a particularly poignant moment, in that the girl is his own niece. And on the romantic scene, Callie (Sara Ramirez) demands to know how George really feels about her, while Derek and Addison (Kate Walsh) reach yet another crossroads. In keeping with the "ensemble" feel of this busy episode, the offscreen narration, traditionally the responsibility of Meredith (Ellen Pompeo), is handled by virtually everyone in the cast! ~ Hal Erickson, Rovi