• Season 5 Episode 17
  • I Will Follow You into the Dark

  • Airdate:12.03.2009.

After learning at a deposition that more of his patients have died than survived, Derek decides to quit, even as Meredith refuses to give up on him. Meanwhile Bailey and the Chief continue to bicker over her peds fellowship -- until Adele steps in to mediate -- and Izzie's interns discover something unsettling on a "patient x," unaware that the charts they're looking at are actually Izzie's,

series regulars:

    Ellen Pompeo as Meredith Grey
    Patrick Dempsey as Derek Shepherd
    Sandra Oh as Cristina Yang
    Katherine Heigl as Isobel "Izzie" Stevens
    Justin Chambers as Alex Karev
    T.R. Knight as George O'Malley
    Chandra Wilson as Miranda Bailey
    James Pickens, Jr. as Richard Webber
    Sara Ramirez as Callie Torres
    Eric Dane as Mark Sloan
    Chyler Leigh as Lexie Grey
    Kevin McKidd as Owen Hunt

guest cast:

    Jessica Capshaw as Dr. Arizona Robbins
    Michael Rady as Mike Shelley
    Wendy Hoopes as Tricia
    Erin Cahill as Meg
    Susane E. Lee as Beth
    Brandon Scott as Intern Ryan
    Loretta Devine as Adele Webber

written by:

Jenna Bans

directed by:

Rob Corn