Streaming, rent, or buy Ancient Aliens – Season 21:
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6 Episodes
S21 E1 - Episode 1
S21 E2 - Episode 2
S21 E3 - Episode 3
S21 E4 - Episode 4
S21 E5 - Episode 5
S21 E6 - Episode 6
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Synopsis
"Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years.
