Stagione 5 • Episodio 17

I Will Follow You Into the Dark

2009-03-12 ★ 8.3 43 min

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."

Guest Star

Jessica Capshaw

Loretta Devine

Gloria Garayua

Mark Saul

Wendy Hoopes

Erin Cahill

Michael Rady

Candice Afia