What's On Tonight: Ghost Whisperer, Smackdown, Camp Lazlo, Bill Maher

• At 8, PBS has a new NOW, followed by a new Washington Week.
• CBS has a new Ghost Whisperer at 8, then new episodes of Close To Home and Numb3rs.
• NBC has new episodes of 1 vs. 100, Las Vegas, and Law and Order.
• There's a new Nanny 911 on FOX at 8, then a new Trading Spouses.
• The CW has a new Smackdown! at 8.
• At 9, Cartoon Network has a new Squirrel Boy, then a new Camp Lazlo.
• TLC has a new What Not To Wear at 9.
• Also at 9: ESPN has two new eps of The U.S. Poker Championships.
• At 9:30, Food Network has a new Giada's Weekend Getaways, in San Francisco.
• At 10, USA has a new Psych.
• At 11, HBO has the season premiere of Real Time With Bill Maher, with guests former Senator John Edwards, Senator Chuck Schumer, former Lt. Governor of Maryland Michael Steele, and former HP chairman and CEO Carly Fiorina.

Check your local TV listings for more.