Watch S5:E4 — Secret Aliens — NASA's Unexplained Files

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S5 · E4 — Secret Aliens

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S5:E4 · Secret Aliens

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Episodes

8 episodes in this season

E1

JFK UFO Conspiracy

60 min

E2

Curse of the Gas Giant

60 min

E3

The Sun's Evil Twin

60 min

E4

Now Playing

Secret Aliens

60 min

E5

Stonehenge on Mars

60 min

E6

CIA's Secret Revenge

60 min

E7

The Moon's Strange Secret

60 min