CBS announced today the addition of four new series to its 2006-2007 primetime line-up, enhancing a line-up that will return 18 shows from last year's schedule, including six from last season's freshman class. The line-up, which includes three new dramas and one new comedy, was unveiled this morning by CBS Entertainment President Nina Tassler.

The four new shows feature a roster of award-winning actors and executive producers and a unique mix of concepts and genres. The freshman series include a young and sexy ensemble comedy, THE CLASS, from "Friends" co-creator David Crane; SMITH, a high octane heist thriller from "ER's" John Wells starring Ray Liotta and Virginia Madsen; the apocalyptic drama JERICHO, from the producer of "National Treasure," Jon Turteltaub, starring Skeet Ulrich ("Scream"); and SHARK, a glossy, high-stakes courtroom drama from Brian Grazer ("The DaVinci Code," "A Beautiful Mind"), starring James Woods.

Those shows will join a line-up that features more time period winning series and more top 20 hits than any other network as well as a leadership position in nearly every program genre: CBS will return television's Number One drama, CSI: CRIME SCENE INVESTIGATION; the Number One returning comedy, TWO AND A HALF MEN; the Number One and Number Two freshman dramas, THE UNIT and CRIMINAL MINDS; the Number One new comedy, THE NEW ADVENTURES OF OLD CHRISTINE; the Number One news magazine, 60 MINUTES; and the premiere reality series SURVIVOR and the three-time Emmy Award-winning THE AMAZING RACE.