Grey's Anatomy | I Will Follow You Into the Dark
Genre: Drama
Director: Shonda Rhimes
Cast: Adelaide Kane, Alexis Floyd, Anthony Hill, Camilla Luddington, Caterina Scorsone, Chandra Wilson, Chris Carmack, Ellen Pompeo, Harry Shum Jr., Jake Borelli, James Pickens Jr., Kelly McCreary, Kevin McKidd, Kim Raver, Midori Francis, Niko Terho
Description: : 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."