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Grey's Anatomy S5E17 — I Will Follow You Into the Dark
8.5
Grey's Anatomy•Season 5•Episode 17

I Will Follow You Into the Dark

8.5/10 · 1,656 votesMar 12, 200943 min

Ranked #9 of 24 in Season 5•+0.1 vs season avg

Discussion

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."

Directed byRob Corn
Written byJenna Bans
Previous episodeE16 · An Honest MistakeNext episodeE18 · Stand By Me
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Season 5 Episodes24

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Cast12

Ellen Pompeo

Ellen Pompeo

Meredith Grey

Chandra Wilson

Chandra Wilson

Miranda Bailey

Sandra Oh

Sandra Oh

Cristina Yang

Justin Chambers

Justin Chambers

Alex Karev

James Pickens Jr.

James Pickens Jr.

Richard Webber

Patrick Dempsey

Patrick Dempsey

Derek Shepherd

Kevin McKidd

Kevin McKidd

Owen Hunt

Katherine Heigl

Katherine Heigl

Izzie Stevens

Sara Ramirez

Sara Ramirez

Callie Torres

Eric Dane

Eric Dane

Mark Sloan

Chyler Leigh

Chyler Leigh

Lexie Grey

T. R. Knight

T. R. Knight

George O'Malley

Crew2

J

Jenna Bans

Writer

R

Rob Corn

Director

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Episode Summary

"I Will Follow You Into the Dark" is episode 17 of Grey's Anatomy season 5. It scored 8.5/10 from 1,656 votes, ranking #9 of 24 episodes this season (season average 8.4). Directed by Rob Corn and written by Jenna Bans, it aired on March 12, 2009.

Next: E18 · Stand By MeBest of Season 5