Derek Murphy investigates runners whose times seem suspicious, which is what brought him to a 70-year-old doctor named Frank Meza. He’d run an exceptional time of 2 hours, 53 minutes that day, setting a record for the fastest marathon ever run by a man his age.

30 Years A Slave: A moving report from South Korea where the police have rescued hundreds of modern-day slaves tricked into working on salt and seaweed farms on a chain of remote islands. Shockingly, many of those rescued have learning disabilities.