As I sat behind a film camera in his living room, Callum Bagnall, a 25 year-old student from London, Ontario, recounted how he had purchased thousands of diverted “safer supply” pills over two years. His mother, Joanne, listened intently from a nearby sofa chair, flickers of anxiety passing over her expressive eyes. When it was her turn to be interviewed, she described how these opioids had zombified her son and how, on the day he went to rehab, she found prescription bottles stowed throughout his room.