Chris Evert defined an era in women’s tennis, winning at least one Grand Slam title for 13 straight years. Today, she faces a very different kind of fight: ovarian cancer; once an Olympic hopeful, Keri Blakinger is now one of the most prominent prison reporters. Her unusual journey into the American criminal justice system began in, of all places, the world of figure skating; Real Sports follows a training session with the country’s leading underwater criminal investigator as he trains cops in scuba detective work.