10 Most Shocking Moments On ER
9. Greg Pratt Is In The Ambulance
Greg Pratt entered the ER with a serious attitude and a massive chip on his shoulder in the latter end of the ninth season. He frequently butted heads with his colleagues and the patients, though he gradually softened throughout the course of the show.
The season 14 finale saw him treating a patient (played by guest star Steve Buschemi) who later was discovered to be an FBI informant. There was an attempt on the patient's life in the ER, so he was transferred via ambulance. However, this ambulance was booby trapped and exploded - with Pratt in the passenger seat.
Though he survived long enough to be brought back to the hospital, his injuries were too severe and, in the season 15 opener, he dies from his wounds. It was a sad ending to a man who had begun as a cocky but funny resident, who had ascended the ranks to, as it was revealed later in that episode, chief of the ER.