What's On Tonight: Super Tuesday, American Idol, Nip/Tuck

• ABC, CNN, MSNBC, and Fox News have Super Tuesday coverage all night (CBS' coverage starts at 9, NBC's and PBS' at 10).
• At 8, FOX has a new American Idol, then a new House.
• NBC has a new, two hour Biggest Loser at 8.
• At 9, The CW has a new One Tree Hill.
• Discovery has a new Dirty Jobs at 9.
• At 9:30, HBO has a new In Treatment.
• At 10, FX has a new Nip/Tuck.
• Sci-Fi has a new ECW at 10.
• Also at 10: MTV has a new Life of Ryan, followed by a new Rob and Big.

Check your local TV listings for more.