The Secret of Skinwalker Ranch

HISTORY | 9:00 pm

Retired U.S. Army Col. John Alexander, who has written and lectured on UFOs as well as advocated to develop military applications of the paranormal, visits the ranch in the new episode "Digging Up the Past." After the Skinwalker team repeats an experiment that Alexander indicates may have opened up a portal, they receive a mysterious signal that appears to be an attempt to communicate.