The UnXplained season 7 episode 4
Episode title: Alien Contagion
Since the dawn of human history, mankind has faced the ever present threat of organisms so small, that they are invisible to the naked eye. 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. Will Earth's next pandemic come from another world?
