21 Season
438 Episode
Grey's Anatomy - Season 5 Episode 17 I Will Follow You Into the Dark
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."
- Country : United States of America
- Genre : Drama
- Director : Shonda Rhimes
- Cast : Ellen Pompeo, Chandra Wilson, James Pickens Jr., Kevin McKidd, Caterina Scorsone, Camilla Luddington