1. Near-Death Experiences

A doctor is found lifeless after going over a waterfall. Now she and others share their near-death experiences. Does consciousness expand after death?

3. Mediums (2)

A medium leads a séance, deeply moving a student. Plaster casts of "spirit" hands — physical manifestations of the dead — are explored.

4. Signs from the Dead

A bird, a dancing light or a caress: Signs and messages from the dead happen all the time, mediums say. So the grieving look for ways to communicate.

5. Seeing Dead People

Can consciousness survive a body's demise? An investigator records eerie sounds at a historic spot, and a doctor discusses encounters with the dying.

6. Reincarnation

Vivid details and unshakable confidence — from a 5-year-old. A child psychiatrist studies cases of past-life memories, which occur around the world.