The 10 Best Grey's Anatomy Episodes of All Time

We commend you if you survived through this roller coaster ride. Toeing the line between sweet and tragic, this episode begins with a cancer-stricken Izzie slowly losing her memory after brain surgery. Then things get a little lighter when Meredith and Derek confirm their love with a Post-It note wedding. Pretty cute, right? Then, a horribly disfigured George spells out 0-0-7 on Meredith’s palm and your heart dropped into your stomach. The episode ends in shambles for the surgeons when Izzie and George flatline. In a vision, Izzie wears the prom dress that she wore the night Denny died and gets on an elevator with George, who's in a US Army uniform. And we, the viewers, ugly-cry as Greg Laswell's "Off I Go" drowns out our tears.