Topkapi

Jet-setting jewel thief Elizabeth Lipp (Melina Mercouri) drafts master tactician Walter Harper (Maximilian Schell) and some ragtag locals, including grifter Arthur Simpson (Peter Ustinov), to help pinch a gem-encrusted dagger from an Istanbul museum. Unwittingly tapped as a patsy to smuggle guns over the border, Simpson soon ends up straddling both sides of the law. Ustinov scored a Best Supporting Actor Oscar for his first-rate performance.