• Season 3 Episode 15
  • Walk on Water

  • Airdate:08.02.2007.

The interns each react differently to a mass-casualty incident. Meanwhile, George crosses the professional line with Callie, Cristina asks Burke to keep quiet about their engagement, and Richard dons a new hairstyle.

series regulars:

    Ellen Pompeo as Meredith Grey
    Patrick Dempsey as Derek Shepherd
    Sandra Oh as Cristina Yang
    Isaiah Washington as Preston Burke
    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
    Kate Walsh as Addison Shepherd
    Sara Ramirez as Callie Torres
    Eric Dane as Mark Sloan

written by:

Shonda Rhimes

directed by:

Rob Corn