Derek decides to quit after learning that more of his patients have died than survived; Izzie's interns make an unsettling discovery about "Patient X."
First Air Date: 2005-03-27
Runtime: 00:43:14 minutes
Genre: Drama
Stars: Ellen Pompeo, Chandra Wilson, James Pickens Jr., Kevin McKidd, Caterina Scorsone, Camilla Luddington, Kim Raver, Chris Carmack, Jake Borelli, Anthony Hill, Adelaide Kane