"Containment" examines the dangers presented by nuclear waste to both current and future generations. The documentary spotlights the Waste Isolation Pilot Plant near Carlsbad, N.M., the site of an incident in 2014; the Daiichi Nuclear Power Plant in Fukushima, Japan, which suffered a meltdown after the 2011 tsunami; and the Savannah River Site, a former nuclear weapons facility in South Carolina. Also: an excerpt from "Uranium Drive-In," about a proposed uranium mill in Colorado.