Science of Spying is a 52 minutes documentary, produced by NBC in 1965. The video was made available to the U.S. government and is now available at the Internet Archive in cooperation with FedFlix, which makes available various government movies. Science of Spying presents several operations, carried out by the Central Intelligence Agency (CIA), in Cuba, Vietnam, Iran, Latin America and Congo.
Of course, the interviews with former CIA director Allen Dulles, Deputy Director for Plans Richard Bissell and others must be met with lots of skepticism. Many of the facts, presented back in 1965, were either inaccurate or deliberately wrong, as some of the many currently declassified documents have shown. Nevertheless, it is an interesting movie that gives an insight in the view on intelligence work in the 1950's and 1960's.
You can view the complete movie here below, or you can download it for free at the Internet Archive's FedFlix collection.