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Download SD Season 4 Episode
- Season 4 Second Skin
- Season 4 The 1952 Wave
- Season 4 The Freedom of Information Act
- Season 4 The Space Force
- Season 4 The Shoot Down Order
- Season 4 Seeing Is Believing
- Season 4 Inside UFOs
- Season 4 Unwelcome Visitors
- Season 4 Alien Journeys
- Season 4 Finding Aliens
- Season 4 UFOs Photos
- Season 4 UFOs From Earth
- Season 4 Summer of Saucers
- Season 4 Police Sightings
- Season 4 Space Shuttle Encounters
- Season 4 Mass Sightings
- Season 4 Mars, the Final Frontier
- Season 4 Alien Communications
- Season 4 Artificial Alien Intelligence
- Season 4 First Contact
Unsealed: Alien Files - Season 4 Episode 18 Alien Communications
6.65 20 minutes Scientists and Ufologists are scouring the vast regions of space for signs of extraterrestrial life. But if it takes millions of years for light from distant stars to reach Earth, how long could it take for aliens to answer our call?
