The study group is still not taking applications for new members, but Greendale's got some new teachers this year: 'Boardwalk Empire' star and 'The Wire' alum Michael K. Williams (Omar!) will be their fresh outta prison biology teacher; 'Party Down' funnyman Martin Starr is teaching poli-sci and advising the Model UN debates; and John Goodman will play Dean Pelton's new nemesis, the vice dean of the air conditioning repair school. Naturally.

'Community' Season 3 premieres Thurs., Sept. 22, 8PM ET on NBC