Drew Prochaska attempts to confront his fear of sharks, and attorney Heather Cucolo navigates the complicated psychology surrounding sex offenders.

Mark Pagán finds an unconventional solution to his phobia, and military surgeon Rob Lim must operate during a sandstorm in Iraq.

Scientist Faith Dukes wonders if there’s something wrong with her when she fails to couple up, and Cara Gael O'Regan is startled when she tests positive for syphilis.

Bri Riggio struggles to understand the psychology behind her eating disorder, and expert in global risk Seth Baum tries to find a solution to the threat of nuclear winter.