AllMovie

This violent martial-arts film features a galaxy of the blaxploitation genre's best known stars, including Jim Kelly (Black Eliminator) in his final role. Richard Roundtree stars as a tournament promoter who gets shaken down by an evil gangster (Joe Spinell) and must call on his three friends (Kelly, Fred Williamson and Jim Brown) for help. Kelly is the "one down" of the title, as he gets put into a coma fairly early in the proceedings. The usual murder and mayhem ensues, and fans of gritty low-budget action films should be pleased with both the cast and Williamson's crowd-pleasing direction.