17. I Will Follow You Into the Dark (2009)
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."
Release date: 2009-03-12
User rating:
8.2 / 10
13 votes
Season number: 5
Episode number: 17
Runtime: 43 minutes
Director: Rob Corn
Writer: Jenna Bans
Guest stars
Jessica Capshaw
as Arizona Robbins
Loretta Devine
as Adele Webber
Gloria Garayua
as Intern Graciella
Mark Saul
as Steve
Wendy Hoopes
as Tricia Shelley
Erin Cahill
as Megan Shelley
Michael Rady
as Michael Shelley
Candice Afia
as Intern Laura
Brandon Scott
as Ryan Spalding
Joe Williamson
as Intern Pierce
Winston Story
as Intern Leo
Amrapali Ambegaokar
as Intern Dani
Tymberlee Hill
as Intern Claire
Susane Lee
as Beth Dearborn
Phil Abrams
as Dr. John Nelson
B.K. Cannon
as Girl Band Geek
Cast
Ellen Pompeo
as Meredith Grey
Chandra Wilson
as Miranda Bailey
Sandra Oh
as Cristina Yang
Justin Chambers
as Alex Karev
James Pickens Jr.
as Richard Webber
Patrick Dempsey
as Derek Shepherd
Kevin McKidd
as Owen Hunt
Katherine Heigl
as Izzie Stevens
Sara Ramirez
as Callie Torres
Eric Dane
as Mark Sloan
Chyler Leigh
as Lexie Grey
T. R. Knight
as George O'Malley
Rest of guest stars - click here to expand
Nicole Cummins-Rubio - Paramedic Nicole, Molly Kidder - Intern Megan, Marcus McGee - Boy Band Geek