CHRIS EVERT: Tennis superstar Chris Evert defined an era in women's sports, winning at least one Grand Slam title for 13 straight years. Today, she faces a very different kind of fight: ovarian cancer. Mary Carillo reports. Producer: Nick Dolin.KERI BLAKINGER: For Keri Blakinger, the unforgiving world of incarceration in America is intimately familiar — not just because she's one of the most prominent prison reporters but because she also served time in federal prison. Her unusual journey into the American criminal justice system began in, of all places, the world of figure skating, where Blakinger was once an Olympic hopeful. Soledad O'Brien reports. Producer: Dan Litke.SCUBA DETECTIVES: While many scuba divers search for coral reefs and tropical fish, others are on a much different hunt.  Recovery divers use the sport of scuba diving to investigate underwater crime scenes. Real Sports follows a training session with the country's leading underwater criminal investigator as he trains cops in scuba detective work. They visit Panama where a master scuba diver recently recovered the bodies of two women trapped in a plane at the bottom of the ocean. Jon Frankel reports. Producer: Maggie Burbank.