So much for a sophomore slump: Glee was a hit with teens and adults on Tuesday, which, together with the debuts of Raising Hope and Running Wilde, helped Fox to win the night in the key demographics. The dramedy scored its second-highest rated telecast ever among adults 18-49 (5.5 rating/16 share) and its highest-rate telecast ever among adults 18-34 (6.4/20). The episode attracted 12.2 million viewers.

http://hollywoodinsider.ew.com/2010/09/22/fall-2010-ratings-glee-wins-big-the-biggest-loser-attracts-smaller-audience/