Is there a doctor in the house? The stars of Grey's Anatomy hit the picket lines this week in support of the show's writers. Dressed in surgical scrubs, Katherine Heigl, T.R. Knight, Sandra Oh, Sara Ramirez, Ellen Pompeo, Patrick Dempsey, Justin Chambers and Eric Dane hoisted poster board signs outside of Prospect Studios in LA yesterday. On set to film their last scripted episode, the actors were feeling the writers' pain. "We're supposed to be going until the end of May and right now our last shooting day will be Tuesday or Wednesday," Knight told the AP. "As actors, we're paid a different way than the writers, but there's also the crew to keep in mind. They are out of work as of next Wednesday." And Heigl added, "The writers are everything. We can't do it without them."