By Lynette Rice
January 15, 2009 at 12:00 PM EST

NBC has renewed 30 Rock and The Office for another year, and the network has ordered a new police drama from John Wells called Southland, which will inherit ER’s timeslot as soon as that series goes off the air on April 2, NBC primetime president Angela Bromstad announced today at the Television Critics tour. Bromstad also told reporters that she picked up three additional episodes of ER, bringing the total season order to 23 episodes. The drama’s long-awaited series finale will stretch over three hours on April 2 — beginning with a one-hour retrospective and ending with a two-hour original episode/goodbye. A week later, NBC will debut Southland, a series that NBC describes as a “fast-moving drama that’ll take viewers inside the lives of cops, criminals, victims, and their families.” The pilot was originally picked up by Teri Weinberg, Bromstad’s predecessor, who now has a producing deal at the network.

In other news, the net will bring back another edition of Celebrity Apprentice on March 1, launch a new cooking reality show called The Chopping Block on March 11, and unveil the still-untitled Amy Poehler comedy on April 9.

Although Bromstad has yet to pick up another season of Heroes, she said the network remains committed to the now-beleaguered drama. “We want to get back to the core of the show,” she said. “It may have taken on too much in terms of characters and multiple storylines.”

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