In 1959, nine experienced hikers set off into the Ural Mountains- and never returned.  When their bodies were found, scattered and mutilated under bizarre and unexplained circumstances, the mystery of Dyatlov Pass was born.  Was it a freak natural disaster, a military cover-up. or something even stranger?  In this episode, we trek through the chilling details of one of history's most perplexing unsolved cases.