There is one film that sticks in my memory. My mother mentioned a highly political thriller called Missing (1982), she saw it in the 80s on television, late at night. Elaine Paige made a song based on the theme by Vangelis.
The film is actually based on the true story of an American journalist/photographer called, Charles Horman who disappeared in the very bloody aftermath of the US-backed right-wing agenda Chilean coup of 1973, to overthrow the democratically elected socialist president Salvador Allende.
It was banned for years apparently, especially in Chile under Pinochet's dictatorship, and there were lawsuits against Universal studios in the US, and against the film's director, Constantin Costa-Gavras, who also wrote the screenplay. Lawsuits against the US state department who lied denied about being involved. But, I managed to see a copy of the film rented from a video shop in the late 90s. It left a lasting impression on my then 15-year old self I can tell you.
It was bloody brilliant, Jack Lemmon played the father of Charles Horman, and Sissy Spacek played his wife. And you see them go to Chile (although the country itself isn't named), to find out what happened to Charles. His body was sent home to the states seven months after the coup.
I am not a conspiracy theorist by any means, but the US had the blood of its own citizens who lived in Chile at the time all over its hands with this. All to push a right-wing dictator into power. It was a very moving film, because you see the realization of a father who previously held his own country's democracy in a state of reverence almost, then being involved in the murder of its own people, and indeed his own son.
And yet nobody else I know has heard of this film, apart from my mother.
There is also a book out, which I haven't read called, The Execution of Charles Horman: An American Sacrifice. The film finally got released again in 2006. I might buy a copy from Amazon.