Mad Max: Beyond Thunderdome (1985)

Mel Gibson and Tina Turner star in the third film of the Mad Max series. Max stumbles onto a desert city in the post-apocalyptic world that is built on the principle of unbridled, cutthroat capitalism where anything--even a human life--can be bartered. Caught in a power struggle between the city's two rulers, Max breaks the one inviolable rule of a city with no other rules when he refuses to kill.