As part of their training, the Chief puts Seattle Grace's residents -- including Meredith, Cristina, April and Jackson -- in charge; meanwhile, Derek, Callie, Owen and the other attending surgeons compete for a million-dollar grant.
Cast: Ellen Pompeo, Sandra Oh, Justin Chambers, Chandra Wilson, James Pickens Jr., Sara Ramirez, Eric Dane, Chyler Leigh, Kevin McKidd, Jessica Capshaw, Kim Raver, Jesse Williams, Sarah Drew, Patrick Dempsey, Jarrod Bailey