Reality juggernauts American Idol, Dancing With the Stars and The Biggest Loser stumbled last night. The final Idol performance  (6.6 rating/19 share among adults 18-49) on Fox was down 23% from last year and probably the lowest-rated ever. The Dancing finale (3.8/10) on ABC was down 27% from its spring finale last year and the lowest-rated ever. The finale of NBC’s Loser (3.8/11) was down 19% from last season’s spring finale. Still, the show was up 23% from last week in 18-49 with its highest demo numbers since Jan. 26. Dancing had the highest-rated results show for of the season. For comparison, Idol was flat with last week’s Top 3 performance show.

Fox’s Glee (4.8/13) at 9PM and NBC’s Parenthood (2.6/7) at 10 PM held on, both flat with last week. CBS’ veteran NCIS (3.2/10) at 8 PM was down 3% from last week and 9% from last season’s finale. The network’s freshmen NCIS: LA (2.7/7) and The Good Wife (2.0/6) fared worse in their final episodes for the season, both posting larger week-to-week declines and their lowest-rated original telecasts ever.