|Jesse Williams, Sandra Oh. Photo Credit: ABC/Danny Feld|
Cristina (Sandra Oh) imagines the two routes her life can take based on one decision she makes.
Meanwhile, one of the hospital's patients decides whether or not to live.
Watch a sneak peek video below:
GREY'S ANATOMY stars Ellen Pompeo as Meredith Grey, Patrick Dempsey as Derek Shepherd, Sandra Oh as Cristina Yang, Justin Chambers as Alex Karev, Chandra Wilson as Miranda Bailey, James Pickens, Jr. as Richard Webber, Sara Ramirez as Callie Torres, Kevin McKidd as Owen Hunt, Jessica Capshaw as Arizona Robbins, Jesse Williams as Jackson Avery, Sarah Drew as April Kepner, Camilla Luddington as Jo Wilson, Gaius Charles as Shane Ross, Jerrika Hinton as Stephanie Edwards and Tessa Ferrer as Leah Murphy.
Guest starring: Anne Dudek as Elise Castor and Charlie Hofheimer as Jason Castor.
"Do You Know?" was written by Stacy McKee and directed by Chandra Wilson.
- Isaiah Washington Returning To GREY'S ANATOMY