Ratings: Idol Lead-out Could Do a Lot Better

This Tuesday's ratings, at a glance:• American Idol's final performance show delivered 24.51 million total viewers, a 1.2 mil bump from last Tuesday but down 5.7 mil from a year ago. Lead-out On the Lot, vying with the Dancing with the Stars finale, premiered to just 8.97 mil — less than half of the audience retention House was getting — and not at all helped by 9:30 tune-out to the tune of four mil.• DWTS bowed out before 22.6 mil, down 4.6 mil from its previous finale.• Tom Selleck's latest Jesse Stone telepic pulled almost 13 mil for CBS, two mil fewer than the series' year-ago entry.• Among scripted season-enders, NCIS put up a typical 13.88 mil; Veronica Mars' last two episodes ever* did 1.83 mil and 2.14 mil; and SVU (10.21 mil), slipping 2.3 mil, came in third at 10 pm.* See the Ausiello Report, now, for an intriguing update on Mars' fate.