Belief is at the heart of the world’s great religions as well as the sustaining power behind the paranormal, supernatural, and occult events that grace America’s tabloids. How can belief be explained, and from what deep well within the human psyche does it spring? In this program, ABC News anchor John Stossel goes to a psychology lab and even walks through fire to investigate the power of belief—as demonstrated by the placebo and "nocebo" effects—and what psychologists call "magical thinking." Mr. Stossel takes a look at a wide range of phenomena that exist beyond the ken of modern science, including astrology, faith healing, voodoo, channeling, and clairvoyance. (40 minutes)