I Will Follow You Into the Dark
Grey's Anatomy · Season 5 · Episode 17
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."
Episode Details
Air date, runtime, timezone, and episode position.
Season
5
Episode
17
Air Date
12/Mar/2009
Air Time
21:00
Runtime
43 min
Overview
Episode 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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