"Wasted Spaces: America's Biggest Pack Rats" (8 p.m., DIY): Why do we keep so much useless stuff

"Wasted Spaces: America's Biggest Pack Rats" (8 p.m., DIY): Why do we keep so much useless stuff around?
"George Lopez" (8 p.m., ABC): And you thought "George Lopez" was canceled ages ago. Nope, the family sitcom returns for its sixth season with an episode that has Carmen heading off to college and Angie discovering that the Lopez family could be growing.
"Medium" (10 p.m., NBC): Ghosts apparently don't always play nice. On "Medium" tonight, Allison finds herself dealing with two odd spirits, one of whom defiantly rebuffs her efforts to determine the identity of his killer.
"Dinner: Impossible" (10 p.m., Food Network): Chef Robert Irvine, who has cooked for Britain's royal family and four U.S. presidents, must prepare a first-class, four-course meal for 150 passengers on a speeding locomotive in just four hours. Impossible? That's the premise put to the test in Food Network's newest series. Irvine, 41, who's been cooking since he was 15, will face a new challenge each week, testing his culinary coordination as he races to beat the clock and prepare a fabulous feast.
"The Naked Trucker & amp; T-Bones Show" (10:30 p.m., Comedy Central): This week, T-Bones claims to have been awarded Vermont's Key to the City and the duo picks up a hitchhiker dressed in a bear suit.