I am reading Frank Feschino's fascinating book on the huge wave of flying saucers in 1952 "Shoot Them Down". I think that the subject would make for a good episode since there is much film and other evidence to the events that happened.
The show could also include information about the now infamous Flatwoods Monster case in Braxton County West Virginia. There are still many original witnesses alive, and the place where it happened is still relatively untouched.
I hope this is considered for the 4th season.
Goddess Bless,
Lloyd