A great surprise.
This is a really gritty, authentic, warts-and-all look at being a cop in LA in the 60s. (from the cops perspective it must be said, but I consider that side's perspective just as valuable as those on the other side.)
Stacy Keach and especially George C. Scott are exceptional here and the movie in general has a very modern feel to it given that it was filmed in 72.
I particularly liked the unusual structure. There is no big final case to lead up to, it's more structured like a ridealong doc, where the story of these characters builds up over a series of nights and days on the beat. It's extremely effective and adds to the sense of authenticity that the film is very clearly going for.
Great example of American 70s filmmaking.