NBC has ordered six episodes of celebrity improv competition Thank God You're Here. The series, which was originally produced in Australia, is being described as Whose Line is it Anyway? meets Let's Make a Deal. Celebrity guests will choose one of several doors to open. Behind each door, a comedy sketch they know nothing about is being performed. Whether they stumble into an operating room, a motorcycle race or an undersea adventure, they'll be greeted by the line, "Thank God you're here!" From that point, the celeb is on his or her own. Their performances will be judged by Kids in the Hall alum Dave Foley and host David Alan Grier.