The UnXplained 7x4 Alien Contagion Season 7 Season 7 6 Episodes Vidsrc 7x1 - The Golden Age of Pirates 7x2 - Impossible Ancient Inventions 7x3 - The Lost 7x4 - Alien Contagion 7x5 - Islands of the Damned 7x6 - Islands of the Damned While modern science has stopped many dangerous viruses and bacteria in their tracks, there is a growing concern that contagious germs could be traveling through the deadly vacuum of space.