Watchers 7: The Physical [UFO] Evidence
Most of this series, "Watchers" is NOT available for free. DVDs can be bought at http://www.lamarzulli.net/dvd-store.php
Interesting commentaries by the producer, L.A Marzulli, and his guests, along with series highlights can be seen on on Youtube via Watchers TV. Here's Episode 1: https://www.youtube.com/watch?v=OyuyRvnHgYQ