Dog Day Afternoon

... which it does, in buckets. Founded on a very interesting true story, embellished by Al Pacino who turns it into gold, albeit not in the quantities his character would have hoped for. With a stonking supporting cast, non better than John Cazale, you'll be drawn into the events presented as if you were there on the day, or afternoon, and quite probably investigate further as the titles start to role. Without question one of the best films of the 70s and one of few that retains its progressive and powerful impact all these years later.