What's on tonight: Veronica Mars, House, Boston Legal, Dirt

• At 8, FOX has a new American Idol, followed by a new House.
• NBC has a new Dateline at 8.
• The CW has a new Gilmore Girls at 8, then a new Veronica Mars.
• At 9, ABC has a new Big Day.
• Discovery has a new Dirty Jobs at 9.
• The History Channel has a new Ancient Discoveries at 9.
• At 10, CBS has a new 48 Hours Mystery.
• ABC has a new Boston Legal at 10.
• There's a new episode of Miami Ink on TLC at 10.
• Bravo has a new Real Housewives of Orange County at 10.
• Also at 10: FX has a new episode of Dirt.
• At 10:15, TCM has the classic western Shane.

Check your local TV listings for more.