New laugh track: NBC tries strategic shifts; CBS tweaks.

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NBC unveiled Monday an aggressive reshuffling of its primetime programming for the midseason, displacing three series from its Thursday lineup.

CBS unveiled its midseason moves as well, giving its new Rob Schneider laffer the plum post "Big Bang Theory" slot. But the Eye has the luxury of making far fewer changes befitting a primetime schedule with greater stability than the Peacock's.

NBC's "Community" and "Prime Suspect" are being benched from Thursday to make room for the return of "30 Rock" at 8 p.m. and the introduction of "The Firm" at 10 p.m. "Whitney" is trading nights with another NBC rookie comedy, "Up All Night," which comes in to the Thursday 9:30 p.m. berth behind "The Office."

"Whitney" will slide into the anchor position on Wednesday as a lead-in for another new series, "Are …