SELL THIS HOUSE MARATHON 6 p.m. Friday, Dec. 10 A&E (Comcast Ch. 51) For the first few months after most folks buy a house, they jump at the chance to paint, fix and otherwise spiffy up their new domicile. Soon, however, the honeymoon is over. Things break, paint peels and anything that doesn’t block the view of the TV when it falls down doesn’t get fixed. That’s fine and dandy when you’re just trying to keep the rain off your pretty little head. What happens when you’re ready to sell, though? Here, A&E presents four episodes of its hammer-slinging reality show, “Sell This House,” in which designers and carpenters are brought in to tell would-be sellers what they need to sprucify in order to get top dollar for their oh-so-yesterday abodes. BEN FRANKLIN 7 p.m. Saturday, Dec. 11 History Channel (Comcast Ch. 70) Though we all know that Ben Franklin flew a kite with a key attached and somehow discovered electricity, that he invented bifocals (you should know that, anyway) and that he’s on the hundred-dollar bill, most people don’t know nearly as much as they should about this most flamboyant of Founding Fathers. Not only did ol’ Ben invent the comb-over, he was also a publisher, a stellar statesman who helped shepherd many of the sacred American documents through to the form they know today, not to mention something of a ladies’ man (maybe that’s why he’s on the hundred-dollar bill). This two-hour special discusses the life and legacy of one of early America’s most complicated men. CONSPIRACY: THE OKLAHOMA CITY BOMBING 9 p.m. Sunday, Dec. 12 History Channel (Comcast Ch. 70) On April 19, 1995, at 9:02 a.m., a thousand-pound homemade bomb exploded in front of the nine-story Alfred P. Murrah Federal Building in Oklahoma City and ushered in a new era of fear. One hundred-sixty eight people were killed, with another 700 seriously injured. As with any large-scale tragedy — especially one so connected to this country’s already paranoid extremist community — conspiracy theories immediately sprouted from the ashes, and have flourished since. Did Timothy McVeigh act alone? How about John Doe No. 2? What about rumors that the government was somehow involved? Here, the History Channel asks experts and forensic scientists to weed through the theories, trying to determine which ones belong to the world of probability and which ones are better left to the Tinfoil Hat Brigade.