Superb low-budget sci-fi. If you have ever had even 1 conspiracy theory thought in your head, this movie will tickle your fancy. For those who were alive in the 60s and 70s they nailed the wholesome family in the backyard BBQ get-together. There were many subtle elements of the movie that made its believability factor very high, like the prevalent attitude at that time "Why wouldn't you trust your government" Oh and the obvious political fears of that time were highlighted as well (not too much I don't want to create a spoiler). The antagonist was understated, yet again, enhance the believability. Great acting all around.