In the Season 8 finale, vaccination is considered modern medicine's greatest weapon against disease but thanks to pseudo-science and public gullibility, the debate over vaccination safety rages on.

In the Season Eight premiere, it's as all-American as apple pie, but cheerleading is also responsible for 65% of all catastrophic female sport injuries, with competitive coaches, fanatic parents, and a multimillion dollar industry concerned with its bottom line.

Everyone wants to get rich quick, but are multilevel marketing schemes really the answer? Penn & Teller reveal the truth about direct-sales companies that market everything from sausages to sex toys.

Is America's criminal justice system weighed down with bad science, ineffective methods, incompetence and corruption? Penn & Teller set out to reveal that the only thing scarier than crime is America's war on crime.

Thanks to centuries of Eastern mystique, the martial arts may appear spiritual and special. The mischievous magicians take a more skeptical look at a bunch of guys in pajamas breaking boards with their feet and overweight housewives learning to "defend" themselves.

Is the government hiding alien spaceships? Follow a team of UFO hunters on an overnight expedition in search of mysterious aircraft flying above a secret military facility known as Area 51.

Hold on to your cheeseburger! Public Health agencies, food activists and special interest groups have launched an all-out war against fast food restaurants. Should the government really be spending our tax dollars to regulate what, where, and how we eat?

Research has proven that self-esteem-building does not work. However, misguided parents, coaches and social workers are using this flawed technique to create a generation of narcissistic losers who believe that they are "special."

Every generation worries about teen sex, but today's parents are more hysterical than ever. The duo will look at the drastic measures adults are taking to combat the perceived dangers of teenage promiscuity, "sexting," and gay-straight alliances.

According to Penn and Teller, America's seniors are stripped of their dignity thanks to ongoing stereotypes about old people. They investigate the widespread beliefs that old people can't drive, don't have sex, and smell bad.