The Thin Blue Line was the second of three documentaries William Friedkin made for producer David Wolper. It focused on the police force, and the experience making it influenced Friedkin on The French Connection.
There are 51 films with the same actors, 25 films with the same director, 8971 with the same cinematographic genres, 978 films with the same themes (including 73 films with the same 2 themes than The Thin Blue Line), to have finally 70 suggestions of similar films.
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