With a heavy reliance on scripted fare, CBS was hit hard by the writers strike. "CSI: Crime Scene Investigation," long CBS' top regular series, ran its last original episode, written before the strike, on Jan. 10; it won't return with another until April 3. The involuntary hiatus afflicted most of the rest of CBS' lineup as well, including the promising freshman sitcom "The Big Bang Theory" (pictured, with Jim Parsons, left, and Johnny Galecki). "I don't think there's anyone who's going to read anything into this season," said David Poltrack, CBS' executive vice president of research and planning. "Our dominant franchise is scripted programming, and we have been without it for most of the season."