Blade Runner

Why are all 70s and 80s movies about the future set in dark, stormy worlds? Great futuristic sets and ideas - Harrison Ford is a blade runner, a policeman who "retires" escaped "replicants" (artificial humans). After 6 escape, he ends up timidly hunting down the remaining 4 and on the way falls in love with another experimental replicant (with the 80s signature big-hair, shoulder pads and simple love story). Violent and thrilling with an attempt at tackling the issue of machines and emotions. Music by Vangelis.