Missing Dial

In a project that hits close to home, National Geographic Channel forays into the true-crime genre by documenting biologist and National Geographic explorer Roman Dial's investigation into the 2014 disappearance of his son. An experienced outdoorsman, Cody Roman Dial vanished while trying to complete a solo expedition through the Corcovado National Park in Costa Rica, one of Central America's most dangerous jungles. ``Missing Dial'' chronicles how Roman, along with a former DEA special agent an…