Last week, CBS's (NYSE: CBS ) The Big Bang Theory made television history of a sort, when a repeat of the popular sitcom beat out an original live episode of American Idol -- Fox's erstwhile ratings juggernaut. TBBT not only scored more viewers over all in the 8:30 time slot in which it ran; it also attracted significantly more of the 18-to-49 age group whom advertisers covet.
Unfortunately not, as Fool contributor Rich Smith explains in this video. (Which is also, incidentally, popular with the 18-to-49 set).
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