Adventurer and survivalist Cliff Simon explores paranormal mysteries in some of the world's most extreme and challenging environments. Along the way, scientists, shamans and historians provide clues that shed light on dark secrets that defy explanation.
| Season | From | To | Episodes |
|---|---|---|---|
| Specials | 0 | ||
| Unassigned Episodes | 6 |
| Season | From | To | Episodes |
|---|---|---|---|
| Unassigned Episodes | 6 |
| Season | From | To | Episodes |
|---|---|---|---|
| Season 1 | 0 | ||
| Unassigned Episodes | 6 |
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