There've been a lot of shows debunking the conspiracies surrounding the Kennedy assassination. (I'm going to assume that's what you mean.) The ones on the Discovery Channel were episodes of a series called Unsolved History, and while I don't know how to get a hold of them other than contacting the Discovery Channel to buy copies, they'll pop up now and again, between episodes of shows about mechanics.
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Gillian
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"