The Penn and Teller Bullshit series is one of the best set of shows I've ever seen. Each episode targets a different topic which the comedy duo proceeds to debunk, including the war on drugs, gun control and family values.
It's refreshing to watch smart, insightful, humorous, zero-bullshit presentations on each of these controversial issues. It's also interesting to note that the show was nominated for three Emmys.
You can watch all the episodes on YouTube; here's a link to the entire series.