The Defiant Ones

[HBO] HD. 'Part 1.' Long before becoming music icons, Jimmy Iovine and Dr. Dre chart out separate career paths in the 1980s.

[HBO] HD. 'Part 2.' Dr. Dre pioneers gangsta rap with N.W.A; Jimmy Iovine burnishes his reputation as a superstar producer.

[HBO] HD. 'Part 3.' Iovine charts a new course with Interscope Records; Dr. Dre moves past N.W.A., with combustible results.

[HBO] HD. 'Part 4.' Dre and Jimmy strike gold with Eminem and others; how the threat of free online music led to Beats, and an Apple megadeal.