NBC is bringing back its trademark two-hour comedy block on Thursdays with freshman "30 Rock" and "Scrubs" joining "My Name Is Earl" and "The Office." Meanwhile, another new NBC comedy, "Twenty Good Years," is being pulled off the schedule.

"30 Rock" will be first to join the Thursday lineup Nov. 16 for a supersize night of 40-minute episodes of "Earl," "Office" and "30 Rock" leading into "ER."