Phelps relives the highs and lows that made up his Olympic experiences in London and Rio.

Phelps relives the highs and lows that made up his Olympic experiences in London and Rio.

Phelps' near perfection earns him an unprecedented place in Olympic history at Beijing 2008.

Phelps' near perfection earns him an unprecedented place in Olympic history at Beijing 2008.

The first of the three-part documentary series features Phelps looking back at each race of his Olympic career with NBC Sports swimming commentators Dan Hicks and Rowdy Gaines.

The first of the three-part documentary series features Phelps looking back at each race of his Olympic career with NBC Sports swimming commentators Dan Hicks and Rowdy Gaines.