Dark matter

Louis Theroux's new three-part series Dark States starts on BBC2 tonight, with a programme about the heroin epidemic that's consuming Huntington, West Virginia. To mark the occasion, Vice's Daniel Dylan Wray has spoken to him about his fascination with drugs and those who (ab)use them and how he manages to earn the confidence and trust of some truly confrontational individuals. Wray is probably a sympathetic interviewer, given his own distinctly uncomfortable experience talking to Curb Your Enthusiasm's Richard Lewis.