Kathie Russo's husband was Spalding Gray, who was best known for delivering monologues onstage—like "Monster in a Box," and "Swimming to Cambodia." On January 10, 2004, he went missing. Witnesses said they saw him on the Staten Island Ferry that night.

For some people, the fear of sleep is linked to the fear of death. We hear from some of them.

One day at church camp, David Maxon challenged the devil to show himself. Just then, a huge thunderstorm started, and David felt sure the devil was behind it.

In the late 1960s, a California TV repairman named Bob Nelson joined a group of enthusiasts who believed they could cheat death with a new technology called cryonics. But freezing dead people so scientists can reanimate them in the future is a lot harder than it sounds.