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Grey's Anatomy Season 5 Episode 17 : I Will Follow You Into the Dark

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Summary

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."

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Episode Guide

Season 01
s01e01
A Hard Day's N
season 01
episode 01
s01e02
The First Cut
season 01
episode 02
s01e03
Winning a Batt
season 01
episode 03
s01e04
No Man's Land
season 01
episode 04
s01e05
Shake Your Gro
season 01
episode 05
s01e06
If Tomorrow Ne
season 01
episode 06
s01e07
The Self Destr
season 01
episode 07
s01e08
Save Me
season 01
episode 08
s01e09
Who's Zoomin'
season 01
episode 09
Season 02
s02e01
Raindrops Keep
season 02
episode 01
s02e02
Enough is Enou
season 02
episode 02
s02e03
Make Me Lose C
season 02
episode 03
s02e04
Deny, Deny, De
season 02
episode 04
s02e05
Bring the Pain
season 02
episode 05
s02e06
Into You Like
season 02
episode 06
s02e07
Something to T
season 02
episode 07
s02e08
Let it Be
season 02
episode 08
s02e09
Thanks for the
season 02
episode 09
s02e10
Much Too Much
season 02
episode 10
s02e11
Owner of a Lon
season 02
episode 11
s02e12
Grandma Got Ru
season 02
episode 12
s02e13
Begin the Begi
season 02
episode 13
s02e14
Tell Me Sweet
season 02
episode 14
s02e15
Break on Throu
season 02
episode 15
s02e16
It's the End o
season 02
episode 16
s02e17
As We Know it
season 02
episode 17
s02e18
Yesterday
season 02
episode 18
s02e19
What Have I Do
season 02
episode 19
s02e20
Band Aid Cover
season 02
episode 20
s02e21
Superstition
season 02
episode 21
s02e22
The Name of th
season 02
episode 22
s02e23
Blues for Sist
season 02
episode 23
s02e24
Damage Case
season 02
episode 24
s02e25
17 Seconds
season 02
episode 25
s02e26
Deterioration
season 02
episode 26
s02e27
Losing My Reli
season 02
episode 27
Season 03
s03e01
Time Has Come
season 03
episode 01
s03e02
I Am a Tree
season 03
episode 02
s03e03
Sometimes a Fa
season 03
episode 03
s03e04
What I Am
season 03
episode 04
s03e05
Oh, The Guilt
season 03
episode 05
s03e06
Let The Angels
season 03
episode 06
s03e07
Where the Boys
season 03
episode 07
s03e08
Staring at the
season 03
episode 08
s03e09
From a Whisper
season 03
episode 09
s03e10
Don't Stand So
season 03
episode 10
s03e11
Six Days (1)
season 03
episode 11
s03e12
Six Days (2)
season 03
episode 12
s03e13
Great Expectat
season 03
episode 13
s03e14
Wishin and Hop
season 03
episode 14
s03e15
Walk On Water
season 03
episode 15
s03e16
Drowning on Dr
season 03
episode 16
s03e17
Some Kind of M
season 03
episode 17
s03e18
Scars and Souv
season 03
episode 18
s03e19
My Favorite Mi
season 03
episode 19
s03e20
Time After Tim
season 03
episode 20
s03e21
Desire
season 03
episode 21
s03e22
The Other Side
season 03
episode 22
s03e23
The Other Side
season 03
episode 23
s03e24
Testing 1-2-3
season 03
episode 24
s03e25
Didn't We Almo
season 03
episode 25
Season 04
s04e01
A Change is Go
season 04
episode 01
s04e02
Love/Addiction
season 04
episode 02
s04e03
Let the Truth
season 04
episode 03
s04e04
The Heart of t
season 04
episode 04
s04e05
Haunt You Ever
season 04
episode 05
s04e06
Kung Fu Fighti
season 04
episode 06
s04e07
Physical Attra
season 04
episode 07
s04e08
Forever Young
season 04
episode 08
s04e09
Crash Into Me
season 04
episode 09
s04e10
Crash Into Me
season 04
episode 10
s04e11
Lay Your Hands
season 04
episode 11
s04e12
Where the Wild
season 04
episode 12
s04e13
Piece of My He
season 04
episode 13
s04e14
The Becoming
season 04
episode 14
s04e15
Losing My Mind
season 04
episode 15
s04e16
Freedom (1)
season 04
episode 16
s04e17
Freedom (2)
season 04
episode 17
Season 05
s05e01
Dream a Little
season 05
episode 01
s05e02
Dream a Little
season 05
episode 02
s05e03
Here Comes the
season 05
episode 03
s05e04
Brave New Worl
season 05
episode 04
s05e05
There's No 'I'
season 05
episode 05
s05e06
Life During Wa
season 05
episode 06
s05e07
Rise Up
season 05
episode 07
s05e08
These Ties Tha
season 05
episode 08
s05e09
In the Midnigh
season 05
episode 09
s05e10
All By Myself
season 05
episode 10
s05e11
Wish You Were
season 05
episode 11
s05e12
Sympathy for t
season 05
episode 12
s05e13
Stairway to He
season 05
episode 13
s05e14
Beat Your Hear
season 05
episode 14
s05e15
Before and Aft
season 05
episode 15
s05e16
An Honest Mist
season 05
episode 16
s05e17
I Will Follow
season 05
episode 17
s05e18
Stand by Me
season 05
episode 18
s05e19
Elevator Love
season 05
episode 19
s05e20
Sweet Surrende
season 05
episode 20
s05e21
No Good at Say
season 05
episode 21
s05e22
What a Differe
season 05
episode 22
s05e23
Here's to Futu
season 05
episode 23
s05e24
Now or Never
season 05
episode 24
Season 06
s06e01
Good Mourning
season 06
episode 01
s06e02
Goodbye (2)
season 06
episode 02
s06e03
I Always Feel
season 06
episode 03
s06e04
Tainted Obliga
season 06
episode 04
s06e05
Invasion
season 06
episode 05
s06e06
I Saw What I S
season 06
episode 06
s06e07
Give Peace a C
season 06
episode 07
s06e08
Invest In Love
season 06
episode 08
s06e09
New History
season 06
episode 09
s06e10
Holidaze
season 06
episode 10
s06e11
Blink
season 06
episode 11
s06e12
I Like You So
season 06
episode 12
s06e13
State of Love
season 06
episode 13
s06e14
Valentine's Da
season 06
episode 14
s06e15
The Time Warp
season 06
episode 15
s06e16
Perfect Little
season 06
episode 16
s06e17
Push
season 06
episode 17
s06e18
Suicide Is Pai
season 06
episode 18
s06e19
Sympathy for t
season 06
episode 19
s06e20
Hook, Line and
season 06
episode 20
s06e21
How Insensitiv
season 06
episode 21
s06e22
Shiny Happy Pe
season 06
episode 22
s06e23
Sanctuary
season 06
episode 23
s06e24
Death and All
season 06
episode 24
Season 07
s07e01
With You I'm B
season 07
episode 01
s07e02
Shock to the S
season 07
episode 02
s07e03
Superfreak
season 07
episode 03
s07e04
Can't Fight Bi
season 07
episode 04
s07e05
Almost Grown
season 07
episode 05
s07e06
These Arms of
season 07
episode 06
s07e07
That's Me Tryi
season 07
episode 07
s07e08
Something's Go
season 07
episode 08
s07e09
Slow Night, So
season 07
episode 09
s07e10
Adrift and at
season 07
episode 10
s07e11
Disarm
season 07
episode 11
s07e12
Start Me Up
season 07
episode 12
s07e13
Don't Deceive
season 07
episode 13
s07e14
P.Y.T. (Pretty
season 07
episode 14
s07e15
Golden Hour
season 07
episode 15
s07e16
Not Responsibl
season 07
episode 16
s07e17
This is How We
season 07
episode 17
s07e18
Song Beneath t
season 07
episode 18
s07e19
It's a Long Wa
season 07
episode 19
s07e21
I Will Survive
season 07
episode 21
s07e22
Unaccompanied
season 07
episode 22
Season 08
s08e01
Free Falling
season 08
episode 01
s08e02
She's Gone
season 08
episode 02
s08e03
Take the Lead
season 08
episode 03
s08e04
What Is It Abo
season 08
episode 04
s08e05
Love, Loss and
season 08
episode 05
s08e06
Poker Face
season 08
episode 06
s08e07
Put Me In Coac
season 08
episode 07
s08e08
Heart-Shaped B
season 08
episode 08
s08e09
Dark Was the N
season 08
episode 09
s08e10
Suddenly
season 08
episode 10
s08e11
This Magic Mom
season 08
episode 11
s08e12
Hope for the H
season 08
episode 12
s08e13
If/Then
season 08
episode 13
s08e14
All You Need i
season 08
episode 14
s08e15
Have You Seen
season 08
episode 15
s08e16
If Only You We
season 08
episode 16
s08e17
One Step Too F
season 08
episode 17
s08e18
The Lion Sleep
season 08
episode 18
s08e19
Support System
season 08
episode 19
s08e20
The Girl With
season 08
episode 20
s08e21
Moment of Trut
season 08
episode 21
s08e22
Let the Bad Ti
season 08
episode 22
s08e23
Migration
season 08
episode 23
s08e24
Flight
season 08
episode 24
Season 09
s09e01
Going Going Go
season 09
episode 01
s09e02
Remember The T
season 09
episode 02
s09e03
Love the One Y
season 09
episode 03
s09e04
I Saw Her Stan
season 09
episode 04
s09e05
Beautiful Doom
season 09
episode 05
s09e06
Second Opinion
season 09
episode 06
s09e07
I Was Made for
season 09
episode 07
s09e08
Love Turns You
season 09
episode 08
s09e09
Run, Baby, Run
season 09
episode 09
s09e10
Things We Said
season 09
episode 10
s09e11
The End is the
season 09
episode 11
s09e12
Walking on a D
season 09
episode 12
s09e13
Bad Blood
season 09
episode 13
s09e14
The Face of Ch
season 09
episode 14
s09e15
Hard Bargain
season 09
episode 15
s09e16
This is Why We
season 09
episode 16
s09e17
Transplant Was
season 09
episode 17
s09e18
Idle Hands
season 09
episode 18
s09e19
Can't Fight Th
season 09
episode 19
s09e20
She's Killing
season 09
episode 20
s09e21
Sleeping Monst
season 09
episode 21
s09e22
Do You Believe
season 09
episode 22
s09e23
Readiness is A
season 09
episode 23
s09e24
Perfect Storm
season 09
episode 24
Season 10
s10e01
Seal Our Fate
season 10
episode 01
s10e02
I Want You wit
season 10
episode 02
s10e03
Everybody's Cr
season 10
episode 03
s10e04
Puttin' on the
season 10
episode 04
s10e05
I Bet it Stung
season 10
episode 05
s10e06
Map of You
season 10
episode 06
s10e07
Thriller
season 10
episode 07
s10e08
Two Against On
season 10
episode 08
s10e09
Sorry Seems to
season 10
episode 09
s10e10
Somebody That
season 10
episode 10
s10e11
Man on the Moo
season 10
episode 11
s10e12
Get Up, Stand
season 10
episode 12
s10e13
Take It Back
season 10
episode 13
s10e14
You've Got to
season 10
episode 14
s10e15
Throwing it Al
season 10
episode 15
s10e16
We Gotta Get O
season 10
episode 16
s10e17
Do You Know?
season 10
episode 17
s10e18
You Be Illin'
season 10
episode 18
s10e19
I'm Winning
season 10
episode 19
s10e20
Go It Alone
season 10
episode 20
s10e21
Change of Hear
season 10
episode 21
s10e22
We Are Never G
season 10
episode 22
s10e23
Everything I T
season 10
episode 23
s10e24
Fear (Of the U
season 10
episode 24
Season 11
s11e01
I Must Have Lo
season 11
episode 01
s11e02
Puzzle With a
season 11
episode 02
s11e03
Got to Be Real
season 11
episode 03
s11e04
Only Mama Know
season 11
episode 04
s11e05
Bend & Break
season 11
episode 05
s11e06
Don't Let's St
season 11
episode 06
s11e07
Could We Start
season 11
episode 07
s11e08
Risk
season 11
episode 08
s11e09
Where Do We Go
season 11
episode 09
s11e10
The Bed's Too
season 11
episode 10
s11e11
All I Could Do
season 11
episode 11
s11e12
The Great Pret
season 11
episode 12
s11e13
Staring at the
season 11
episode 13
s11e14
The Distance
season 11
episode 14
s11e15
I Feel the Ear
season 11
episode 15
s11e16
Don't Dream It
season 11
episode 16
s11e17
With or Withou
season 11
episode 17
s11e18
When I Grow Up
season 11
episode 18
s11e19
Crazy Love
season 11
episode 19
s11e20
One Flight Dow
season 11
episode 20
s11e21
How to Save a
season 11
episode 21
s11e22
She's Leaving
season 11
episode 22
s11e23
Time Stops
season 11
episode 23
s11e24
You're My Home
season 11
episode 24
Season 12
s12e01
Sledgehammer
season 12
episode 01
s12e02
Walking Tall
season 12
episode 02
s12e03
I Choose You
season 12
episode 03
s12e04
Old Time Rock
season 12
episode 04
s12e05
Guess Who’s
season 12
episode 05
s12e06
The Me Nobody
season 12
episode 06
s12e07
Something Agai
season 12
episode 07
s12e08
Things We Lost
season 12
episode 08
s12e09
The Sound of S
season 12
episode 09
s12e10
All I Want is
season 12
episode 10
s12e11
Unbreak My Hea
season 12
episode 11
s12e12
My Next Life
season 12
episode 12
s12e13
All Eyez on Me
season 12
episode 13
s12e14
Odd Man Out
season 12
episode 14
s12e15
I Am Not Waiti
season 12
episode 15
s12e16
When It Hurts
season 12
episode 16
s12e17
I Wear the Fac
season 12
episode 17
s12e18
There’s a Fi
season 12
episode 18
s12e19
It's Alright,
season 12
episode 19
s12e20
Trigger Happy
season 12
episode 20
s12e21
You're Gonna N
season 12
episode 21
s12e22
Mama Tried
season 12
episode 22
s12e23
At Last
season 12
episode 23
s12e24
Family Affair
season 12
episode 24
Season 13
s13e01
Undo
season 13
episode 01
s13e02
Catastrophe an
season 13
episode 02
s13e03
I Ain’t No M
season 13
episode 03
s13e04
Falling Slowly
season 13
episode 04
s13e05
Both Sides Now
season 13
episode 05
s13e06
Roar
season 13
episode 06
s13e07
Why Try to Cha
season 13
episode 07
s13e08
The Room Where
season 13
episode 08
s13e09
You Haven’t
season 13
episode 09
s13e10
You Can Look (
season 13
episode 10
s13e11
Jukebox Hero
season 13
episode 11
s13e12
None of Your B
season 13
episode 12
s13e13
It Only Gets M
season 13
episode 13
s13e14
Back Where You
season 13
episode 14
s13e15
Civil War
season 13
episode 15
s13e16
Who Is He (And
season 13
episode 16
s13e17
Till I Hear It
season 13
episode 17
s13e18
Be Still, My S
season 13
episode 18
s13e19
What's Inside
season 13
episode 19
s13e20
In the Air Ton
season 13
episode 20
s13e21
Don't Stop Me
season 13
episode 21
s13e22
Leave It Insid
season 13
episode 22
s13e23
True Colors
season 13
episode 23
s13e24
Ring of Fire
season 13
episode 24
Season 14
s14e01
Break Down the
season 14
episode 01
s14e02
Get off on the
season 14
episode 02
s14e03
Go Big or Go H
season 14
episode 03
s14e04
Ain't That a K
season 14
episode 04
s14e05
Danger Zone
season 14
episode 05
s14e06
Come on Down t
season 14
episode 06
s14e07
Who Lives, Who
season 14
episode 07
s14e08
Out of Nowhere
season 14
episode 08
s14e09
1-800-799-7233
season 14
episode 09
s14e10
Personal Jesus
season 14
episode 10
s14e11
(Don't Fear) t
season 14
episode 11
s14e12
Harder, Better
season 14
episode 12
s14e13
You Really Got
season 14
episode 13
s14e14
Games People P
season 14
episode 14
s14e15
Old Scars, Fut
season 14
episode 15
s14e16
Caught Somewhe
season 14
episode 16
s14e17
One Day Like T
season 14
episode 17
s14e18
Hold Back the
season 14
episode 18
s14e19
Beautiful Drea
season 14
episode 19
s14e20
Judgment Day
season 14
episode 20
s14e21
Bad Reputation
season 14
episode 21
s14e22
Fight for Your
season 14
episode 22
s14e23
Cold as Ice
season 14
episode 23
Season 15
s15e01
With a Wonder
season 15
episode 01
s15e02
Broken Togethe
season 15
episode 02
s15e03
Gut Feeling
season 15
episode 03
s15e04
Momma Knows Be
season 15
episode 04
s15e05
Everyday Angel
season 15
episode 05
s15e06
Flowers Grow O
season 15
episode 06
s15e07
Anybody Have a
season 15
episode 07
s15e08
Blowin' in the
season 15
episode 08
s15e09
Shelter from t
season 15
episode 09
s15e10
Help, I'm Aliv
season 15
episode 10
s15e11
The Winner Tak
season 15
episode 11
s15e12
Girlfriend in
season 15
episode 12
s15e13
I Walk The Lin
season 15
episode 13
s15e14
I Want a New D
season 15
episode 14
s15e15
We Didn't Star
season 15
episode 15
s15e16
Blood and Wate
season 15
episode 16
s15e17
And Dream of S
season 15
episode 17
s15e18
Add it Up
season 15
episode 18
s15e19
Silent All The
season 15
episode 19
s15e20
The Whole Pack
season 15
episode 20
s15e21
Good Shepherd
season 15
episode 21
s15e22
Head Over High
season 15
episode 22
s15e23
What I Did For
season 15
episode 23
s15e24
Drawn to the B
season 15
episode 24
s15e25
Jump Into the
season 15
episode 25
Season 16
s16e01
Nothing Left t
season 16
episode 01
s16e02
Back in the Sa
season 16
episode 02
s16e03
Reunited
season 16
episode 03
s16e04
It's Raining M
season 16
episode 04
s16e05
Breathe Again
season 16
episode 05
s16e06
Whistlin' Past
season 16
episode 06
s16e07
Papa Don't Pre
season 16
episode 07
s16e08
My Shot
season 16
episode 08
s16e09
Let's All Go t
season 16
episode 09