Politicians and other alarmists claim that playing violent video games leads to teen violence. Penn & Teller attempt to debunk that theory by handing over a real semi-automatic weapon to a nine-year-old to see if playing video games will turn him into a human killing machine.

Polygraphs are used in thousands of investigations and job screenings. Can a machine really detect whether someone is lying? Penn & Teller will meet people whose lives were ruined by the faulty tests.

Millions of people believe their destinies are determined by the positions of the sun, moon, and planets. Penn & Teller follow two astrologers as they dole out advice - for a price.

Penn & Teller examine the organic food industry to determine if it is, in fact, more nutritious, and better for the environment.

Penn and Teller take on the secretive inner world of The Vatican, the holy city of Catholicism and home of the Pope. Due to outcries from the public, this episode was not included on the DVD release of Season 7.

The world will end on December 21, 2012 - that's according to a growing legion of doomsayers who follow the primitive Mayan calendar. The duo follows a pair of investigators to ancient Mexico to explore the mysterious "Mayan Prophecy".

Penn and Teller take a skeptical view of stress and how the modern man feels the need to "cure" what should be considered a normal, everyday part of life.

Penn and Teller investigate the lawn care industry, talk to a man whose unkempt lawn landed him in prison and visit a neighborhood where only one strain of grass can be grown.

On the season seven premiere, Penn and Teller expose the 'Bullshit' behind the people who market and exploit other gullible people by treating them with unorthodox methods to achieve orgasms. Featuring undercover at a 'sex class', interview with the inventor of a 'remote control' orgasm machine, and other segments.

Penn and Teller visit Congress to discuss the bullshit which is America's complex, unfair tax system.