Credit: Project Gravitaur If you're seeking the best UFO documentaries, we have done a deep-dive into aliens, UAP craft, whistleblowers and psy to dig up where watch UFO docs – from "S4: The Bob Lazar Story" to "The Age of Disclosure" and more.

The subject of UFOs and aliens is vast and complex, making it impossible to summarize in one article. Flying saucers/UFOs made headline news throughout the world in 1947, sparked by two major, highly publicized events in the U.S., which generated a wave of “flying saucer” hysteria.