The genius of British comedian Sacha Baron Cohen's mock talk show -- which begat Cohen's other well-known mockumentary characters Borat and Brüno -- is that his straitlaced "guests" don't realize the ruse until it's too late, if at all. As Ali G, the hip-hop host who mangles words and ideas left and right, he interviews heavyweights such as reporter Sam Donaldson, conservative pundit Pat Buchanan, and former EPA Administrator Christine Whitman.