Winning a Battle, Losing the War

On the day of a bike race, injured individuals flood into the hospital, including a pedestrian who is left brain dead. Seeing that he has no chance of ever waking up, Cristina and Izzie wish to use his organs for organ donation, but find that the process is an emotional one. George gets assigned to Mack, a good friend of Chief Webber, and constantly flirts with George. Meanwhile, Meredith continues to try to distance herself from Derek and is forced to deal with Alex's big ego, but through the day, Meredith begins to realize the key to winning the battle.