You kids with your YouTube and your Hulu may not be able to get your head around this, but way back in the retro-tastic 1960s, there were only three nationwide TV channels: ABC, NBC and CBS. (PBS was there, too, but on an entirely different dial, I assure you.) So when Dick and Tommy Smothers started mucking around with the muckety-mucks on their popular comedy-variety TV program — lefty satire of racism, Vietnam, the Nixon administration — the show suffered a quick demise (thanks, network censors!). Author David Bianculli explains it all when he presents and signs his behind-the-scenes book Dangerously Funny: The Uncensored Story of The Smothers Brothers Comedy Hour .

Thu., Dec. 3, 7:30 p.m., 2009

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