What's On Tonight: NCIS, Veronica Mars, Dirt, ECW

• At 8, CBS has a new NCIS, followed by a new episode of The Unit.
• NBC has a new Dateline at 8, then new episodes of Law and Order: CI and Law and Order: SVU.
• FOX has a new American Idol at 8.
• There's a new Gilmore Girls at 8 on The CW, then a new Veronica Mars.
• At 9, ABC has a new Primetime, followed by a new Boston Legal.
• PBS has a new Frontline at 9.
• Discovery has a new Dirty Jobs at 9, then two new eps of Survive This.
• At 10, TLC has a new Miami Ink.
• FX has a new Dirt at 10.
• Sci-Fi has a new ECW at 10.
• Also at 10: Bravo has a new ep of The Real Housewives of Orange County.

Check your local TV listings for more.