Original, chilling and imaginative! Everyone is wonderful in their roles, especially Hepburn, Arkin and Krenna. Hepburn's Sust Hendrix is smart, capable and courageous while still vulnerable and terrified. I've never seen Arkin play a villain before or since but he hits it out of the park here. Mancini's soundtrack is chilling. Terrence Young leads a fine crew through the making of this neo-noir masterpiece!