The Doctors investigate senior stoners and what’s driving this fastest growing group of marijuana consumers. Then one hospital is offering parents DNA scans for their new babies. Is this the future of preventative healthcare? And can banning fast food outlets near schools solve the obesity crisis? Plus, a man turns to The Doctors to confront his fear of butterflies. And can organic wine really prevent hangovers? Plus, does Rihanna have an unhealthy nighttime habit? And, how to stop under eye creases with one beauty hack!