Oldboy is itself world cinema DNA — a South Korean film that influenced Western filmmakers profoundly, including Tarantino and Spike Lee. But its own roots are in a Korean cinema tradition that found in genre films a way to process the country's traumatic history. The hallway fight — one man against many, a single continuous take — became one of the most imitated action sequences in cinema. Oldboy is streaming on the Criterion Channel alongside the full vengeance trilogy.