Secrets of the Dead Season 15

Information gathered about aberrant, unorthodox burial practices from medieval times shed some light on how today's myths about vampires may have started.

Forensic anthropologists excavate an early American colony of Jamestown, Virginia.

Scientists investigate the 1962 Alcatraz Escape by bank robbers, Frank Morris and Clarence and John Anglin. Three men who vanished out into the dark waters surrounding the notorious prison island.

Dr. Kathleen Martinez searches for the lost tomb of Cleopatra. Following her excavations of a 35-meter deep underground shaft in a temple complex in a temple complex dedicated to the ancient Egyptian god Osiris and goddess wife Isis.

International scientists study and document the ancient royal tombs beneath the ancient Mexican city of Teotihuacán