Carol investigates a gaggle of unexplained disappearances, while Holly tells the tale of the mysterious Yuba County 5.
https://en.wikipedia.org/wiki/Dyatlov_Pass_incident ; https://www.mentalfloss.com/article/532063/bizarre-hell-disappearance-yuba-county-five ; http://thedeviationdiaries.blogspot.com/2018/03/the-yuba-sutter-missing-5.html ; https://www.youtube.com/watch?v=tmXq5qlsQVU ; https://en.wikipedia.org/wiki/Yuba_County_Five ; https://lostnfoundblogs.com/f/the-yuba-city-5-detour-to-death
https://www.timesunion.com/news/article/One-year-later-still-questions-on-how-Whiteface-13607502.php
https://www.independent.co.uk/news/world/americas/us-ski-lost-new-york-constantinos-danny-filippidis-canada-firefighter-whiteface-mountain-adirondacks-a8212586.html