<Ul> <Li> Ellen Pompeo as Dr. Meredith Grey </Li> <Li> Sandra Oh as Dr. Cristina Yang </Li> <Li> Katherine Heigl as Dr. Izzie Stevens </Li> <Li> Justin Chambers as Dr. Alex Karev </Li> <Li> Chandra Wilson as Dr. Miranda Bailey </Li> <Li> James Pickens Jr. as Dr. Richard Webber </Li> <Li> Sara Ramirez as Dr. Callie Torres </Li> <Li> Eric Dane as Dr. Mark Sloan </Li> <Li> Chyler Leigh as Dr. Lexie Grey </Li> <Li> Kevin McKidd as Dr. Owen Hunt </Li> <Li> Jessica Capshaw as Dr. Arizona Robbins </Li> <Li> Kim Raver as Dr. Teddy Altman </Li> <Li> Patrick Dempsey as Dr. Derek Shepard </Li> </Ul> <Li> Ellen Pompeo as Dr. Meredith Grey </Li> <Li> Sandra Oh as Dr. Cristina Yang </Li> <Li> Katherine Heigl as Dr. Izzie Stevens </Li>

What happens to derek shepherd in season 6