The Third Man is a British thriller of the post-war era, a clever and original mystery tale and I love it. Based on Graham Greene's script, it stars Joseph Cotten as Holly Martins, a naive American trying to track down an old college friend named Harry Lime (Orson Welles) in post World War II Vienna. Two aspects of this film make a must see: its dramatic photography of a divided Vienna, ravaged by war, and the film's musical score – provided by a solo instrument – a zither. The jaunty but haunting musical score stays with you long after the film's viewing.
It was recently voted the best British film of all time.