Brian Williams will set the course for the new NBC newsmagazine Rock Center. The network is positioning it as a serious news program and expecting a ratings struggle, at least at first.

Kelli Garner is one of the stars of ABC's nostalgic Pan Am. Bob D'Amico/ABC hide caption

Jaycee Dugard talks to ABC's Diane Sawyer. Jill Belsley/ABC News hide caption

Oprah Winfrey, chairman of the Oprah Winfrey Network, speaks to reporters during the Discovery Communications Television Critics Association winter press tour in Pasadena, Calif., Thursday, Jan. 6, 2011. Chris Pizzello/Associated Press hide caption

Aziz Ansari stars as Tom Haverford on NBC's Parks And Recreation. Chris Haston/NBC hide caption

Andre Braugher, LisaGay Hamilton, Ray Romano and Scott Bakula star on TNT's Men Of A Certain Age. Danny Feld/TNT hide caption

Justin Grennen looks on as Carson Daly signals a recent victory for Beverly McClellen on NBC's The Voice. Lewis Jacobs/NBC hide caption

Steve Carell's Michael Scott is saying goodbye to Dunder Mifflin — and the employees he's managed (and mortified) over the years. Trae Patton/NBC Universal hide caption

Dr. Drew Pinsky is the face of many of television's most popular addiction shows, like Celebrity Rehab and Sober House. Tonight, he brings a new show to cable. Astrid Stawiarz/Getty Images hide caption

Karate Kid star Ralph Macchio (right) dances with his partner, Karina Smirnoff, in rehearsals for the new season of ABC's Dancing With The Stars, which returns Monday night. Rick Rowell/ABC hide caption

Steven Tyler, Jennifer Lopez and Randy Jackson are hard at work on the new season of American Idol. Frank Micelotta/Fox hide caption

Deggans says ABC's Mr. Sunshine, with James Lesure (left) and Andrea Anders as coupled co-workers, is one of the few network shows to mine laughs and drama from the realities of interracial relationships. Mitch Haddad/ABC hide caption

Timothy Olyphant stars as Raylan Givens in Justified, which returns Wednesday night on FX. Prashant Gupta/FX hide caption