UNDERRATED 'An Idiot Abroad': Inexplicably airing on the Science Channel, this live-action extension of HBO's "Ricky Gervais Show" outdoes its animated counterpart. With the ever-cackling Gervais and Stephen Merchant pitting the cue ball-headed Karl Pilkington against a variety of indignities in visiting the Seven Wonders of the World, this is global travel without the camera-ready veneer -- and Pilkington's simple but twisted wit is a lot smarter than you'd think. Discovery Channel
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