Penn & Teller: Bullshit! is an American documentary television series that aired for eight seasons from 2003 to 2010 on the premium cable channel Showtime. Penn & Teller: Bullshit! was hosted by professional magicians and skeptics Penn & Teller. Its format consists of debating political topics, often from a naturalist libertarian capitalist point of view (the political philosophy espoused by both Penn and Teller) or aiming to debunk pseudoscientific ideas, paranormal beliefs, popular fads and misconceptions. The hosts examine topics within the analytical structure of science.