The Unknown

When a talented, vibrant young woman is abducted from her apartment in Maryville, Tennessee, time is of the essence to find her. When the worst is revealed, authorities discover that the human predator behind the vicious crime had been lurking far longer than anyone knew. Anti-St ...  Show more

Two friends set off for a walk along a set of railroad tracks in Wisconsin, but only one returns alive. Exactly what happened on a snowy winter’s day in 1920 near a once bustling limestone quarry is as difficult to grasp as the wind. View source material and photos for this episo ...  Show more

When a National Park Service Ranger vanishes from his post in the Arizona mountains, he's never seen again. Questions endure in the strange and controversial case of the only National Park Service Ranger to ever go missing—and never be found—in this episode of Last Seen Alive. If ...  Show more

David Paulides, a former police officer turned researcher, has spent years investigating unexplained deaths and disappearances in North America’s national parks. His work has catalogued thousands of cases that defy easy explanation. In this episode, we follow his findings and ask ...  Show more

Up and Vanished presents... Status: Untraced. In 2016, survivalist and world traveler Justin Alexander goes missing in the Parvati Valley while on a spiritual trek into the Himalayan Mountains. While the circumstances of his disappearance point to murder, a chilling message he le ...  Show more

When an experienced hiker vanishes from one of her favorite trails, her friends and family are forced to wonder – Did she walk away from her life? Did she underestimate the danger of the great outdoors? Or did she fall prey to a threat of a more sinister nature?