'' I Saw the Devil '' was released in South Korea on August 12 , 2010 . The film premiered at the 2011 Sundance Film Festival on 21 January 2011 . It also received screenings at several other international film festivals , including the Fantasporto Film Festival , Toronto International Film Festival , Sitges Film Festival , San Sebastian Film Festival and the London Korean Film Festival
2011 Sundance Film Festival
2011 Sundance Film Festival
I Saw the Devil