This week's Doc of the Week takes into the United States' unprecedented public health crisis -- addiction. In an effort to better understand addiction as a biological and emotional affliction and to explore the multitude of ways it can manifest for millions of individuals across the United States, 1 IN 7 weaves one man’s personal struggles with depression and addiction and his experiences as a recovering alcoholic and substance abuser - explored over the course of his cross-country run from New York to Seattle - with the lives, stories, and circumstances of a range of other Americans living with or affected by the disease.