What's On Tonight: Big Brother, Back To You, Ballroom Challenge

• At 8, FOX has a new American Idol, then a new Back To You.
• CBS has a new Big Brother at 8.
• ABC has a new Wife Swap at 8, followed by new episodes of Supernanny and Men in Trees.
• PBS has new episodes of America's Ballroom Challenge and American Masters.
• NBC has a new Deal Or No Deal at 8.
• There's a new America's Next Top Model at 8 on The CW.
• Also at 8: TCM has On The Beach, followed by High Noon.
• At 9, CNBC has a new American Greed.
• HGTV has a new Deserving Design at 9, then a new Design on a Dime.
• At 9:30, HBO has a new In Treatment.
• At 10, NBC has a new Law and Order.
• Bravo has a new Project Runway at 10.
• At 10:30, Comedy Central has a new Reno 911.

Check your local TV listings for more.