Spec averaged 12.95 million viewers

CBS continues to dip into its newfound fountain of youth as the third AFI “100 Years” spec posted big demo gains.

Tuesday’s “AFI’s 100 Years, 100 Laughs” averaged 12.95 million viewers for its three hours and an adults 18-49 rating of 4.5/13. In adults 18-49, that represents a 61% gain over last year’s 2.8 for “100 Years, 100 Stars” and gives CBS its best Tuesday score in the demo since Nov. 15 (“Aftershock: Earthquake in New York”).

In homes, this year’s 8.6/14 is an 8% improvement over each of the last two years (8.0).

The spec received a heavy promo push during the first two weeks of the net’s summer demo phenom “Survivor,” which has funneled millions of new young viewers to CBS.

The Eye net placed first on the night in men 25-54 (4.8/14) and second in adults 18-49 — its most competitive finish in the key demo this season. “Laughs” won its last three half-hours in adults 18-49.

ABC took the night in viewers and demos behind the best Tuesday ratings for “Millionaire” (23.84 million, 7.1/23 in adults 18-49) since the May 2 celeb edition. Seg featured the fourth million-dollar winner since the quizzer bowed in August.

The second episode of NBC’s “M.Y.O.B.” (3.4/9) retained a still-strong 89% of its adults 18-49 lead-in from “Will & Grace” (3.8/11) and placed third in its 9:30 slot.

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