The Unexplained

Geometric patterns cover miles of Peruvian desert.

Three cases of exceptional heroism: a Secret Service agent, a Marine and a woman who risked their lives for others.

Hard-core UFO believers called "Saucer Seekers" investigate reported sightings and landings of alien spacecraft.

Teleportation; the Philadelphia experiment.

A probe into the twisted behavior of Robert John Bardo, who murdered actress Rebecca Schaeffer, and teacher Mary Kay Letourneau, who had a shocking affair with a 13-year-old student.

Sacred voodoo rituals: snake deification, purification, animal sacrifice and spirit possession.

It has been said that the only constant in human life is change. But it is the stories of extreme transformation that sometimes defy our imagination. In this program, we'll explore the ways and the reasons that people transform themselves. First, the story of Cindy Jackson, an Ohio farm girl who became enchanted with the looks and imaginary lifestyle of the Barbie doll. Enchanted enough to spend nearly $250,000 over the last decade to change her appearance through nearly 30 cosmetic surgical procedures. Then the story of a Chicago man whose fascination with the Star Trek universe prompted him to transform his own life by leaving his marriage and family and taking a "higher calling", to become the leader of the International Federation of Trekkers.