Around the world, and throughout time, thousands of people have witnessed the most extraordinary UFO activity. In the early 1500s, the skies above Germany, were lit up as thousands of people witnessed what they called a battle in the sky. Now, hundreds of years later, similar mass sightings have been seen and recorded. This program features a detailed historical record of these events, and includes new cases, new witnesses, and new locations, as we continue to search for answers about the visitors from space.