Josh Gates sets off on the most extraordinary expedition of his career. He'll journey over 50,000 miles to four continents to tackle mankind's greatest question: Are we alone in the universe?
| Season | From | To | Episodes |
|---|---|---|---|
| All Seasons | |||
| Specials | 0 | ||
| Season 1 | October 2017 | October 2017 | 4 |
| Unassigned Episodes | 0 |
| Season | From | To | Episodes |
|---|---|---|---|
| Season 1 | 0 | ||
| Unassigned Episodes | 4 |
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