Go ahead. Slug, drug, kidnap and leave John Shaft buck naked in a sweltering hellhole. It's still no deal. If you want to recruit this tough-minded Manhattan detective for an overseas assignment, you'd better use a language he understands. One that offers a fat up-front fee. And a drop-dead-gorgeous accomplice. Richard Roundtree returns as the indomitable Shaft, who poses as a slave, unmasks the leaders of an Africa-to-Europe slavery cartel and, for good measure, mixes his business with amorous pleasure involving a beautiful princess (Vonetta McGee). The cool-fire impact of Roundtree's performances endures: The actor won the 1993 MTV Movie Award for Lifetime Achievement for his work in the three Shaft thrillers.