Season 1

Ray Leonard's meteoric rise brings him success in and out of the ring while Marvin Hagler takes the hard road to the top. Tommy Hearns' knockouts makes him hard to ignore. But it's Roberto Duran whom Leonard targets to prove his mettle.

Tommy Hearns is crowned champion. Ray Leonard fights Roberto Duran, leading to a notorious ending. A riot breaks out following Marvin Hagler's victory. The stars align for one of the greatest fights of all time: Leonard vs Hearns.

Leonard ascends the throne. A serious eye injury forces his retirement. Duran hits rock bottom but has a miraculous comeback. Leonard and Duran out of the way, the stage is set for one of the greatest fights of all time: Hagler vs Hearns.

Ray Leonard comes out of retirement to fight Hagler. Hagler is disgusted with the judges' verdict and quits. Hearns devastates Leonard in their rematch. Leonard and Duran stage a final fight and the Kings' legacy is assured.