William Daniels, a winner of two Emmy Awards during his run as St. Elsewhere‘s Dr. Mark Craig, is playing doctor again — in a potentially pivotal episode of Grey’s Anatomy.

http://tvline.com/2012/04/03/greys-anatomy-william-daniels-season-8/#more-318166

Cant wait to see this episode!! I have been watching St. Elsewhere on Channel 4 here in England, and love Dr Craig.