When: weeknights, 11:30 pm ET, on Comedy Central
What: The polar opposite of Jon Stewart, Stephen Colbert is a hard-core conservative - or at least that's the role he plays on TV. He's ambivalent about marijuana legalization, on one hand calling it "America's Pot-astrophe," on the other jumping on the bandwagon ("the market has spoken and the market is tokin'"). Either way, Colbert's alway good for a weed punchline.