UFO researcher, Albert K. Bender, had to halt his studies after being visited by strange entities dressed in all black, in this clip from Season 18, "The Shadow People." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date on all of your favorite The HISTORY Channel ...

After receiving multiple reports of strange shadow people sightings, Ancient Astronaut Theorists believe these beings could've been produced from alien technology, in this clip from Season 18, "The Shadow People." Watch all new episodes of Ancient Aliens, Fridays at 9/8c, and stay up to date ...