I Will Follow You Into the Dark
Run Time: 43 mins
Air Date: Thu, 12 Mar 2009
Average Rating: ⭐ 7.9 (10 votes)
ABCSeason 5 - Episode 17
Average Rating: ⭐ 7.9 (10)
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."