Is it possible that sightings of alien beings or UFOs may actually be evidence of time travelers from the future? And might ancient astronauts actually be time travelers?
Subtitles: English
Season 4
S04:E01
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S04:E02
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S04:E03
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S04:E04
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S04:E05
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S04:E06
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S04:E07
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S04:E08
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S04:E09 - The Time Travelers
Is it possible that sightings of alien beings or UFOs may actually be evidence of time travelers from the future? And might ancient astronauts actually be time travelers?
S04:E10
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