Grey's Anatomy Season 4 Episode 17

A couple undergoes surgery. Derek and Meredith clinical trial has another patient. Alex breaks down for the first time ever. Izzie offers a friend some help. A new couple appears. Lexie gets something unexpectedly. George gets a second chance. This is the second hour of a 2-hour season finale. Two episode entries have been created. The 10pm EST marker will mark to beginning of this episode.