Tonight: disaster on NCIS; Lindsay Lohan on Glee

Jamie Lee Curtis and Mark Harmon on 'NCIS.' Photo credit: Richard Cartwright/CBS

NCIS, televisions most popular drama, offers its season finale at 8 tonight on CBS. The previews suggest that a catastrophehits the headquarters.The hour episode will feature guest stars Jamie Lee Curtis, Richard Schiff (as a very nasty villain) and Scott Wolf.

Other highlights tonight:

Do you have any doubt about which celebrity is leaving Dancing With the Stars? Singer Katherine Jenkins suffered a back injury during her second dance Monday, and that sad development probably means shes going. The results show starts at 9 on ABC. Carrie Underwood, Alanis Morissette and Mary J. Blige are set to perform.

If you liked Howard Stern on Americas Got Talent, NBC serves up two more hours of the contest at 8.

Fox counters with two hours of Glee at 8 anda guest appearance by Lindsay Lohan. Maybe thats a sign of how this once charming series has lost its mojo.Does Lohan matter more to viewers than the nationals? The Gleeseries finale will airnext Tuesday.

CBS expands the series finale of NCIS: Los Angeles to two hours, starting at 9. The move should mean good things for CBS ratings. The competition at 10 includes the season finales of ABCs Private Practice and NBCs Fashion Star.