Ill Behaviour (2017)

Sam Bain's first series written on his own, and proof that the bone-deep awkwardness of Peep Show was not all Armstrong. Charlie, played by Tom Riley, is diagnosed with a readily treatable cancer and decides coffee enemas and homeopathy will do the job, so his friends Joel and Tess lock him in a cellar and inject him with chemotherapy drugs against his will, helped by Lizzy Caplan as a deregistered American doctor. It is a black comedy that keeps pushing a terrible idea further than seems possible, which makes it the closest thing on this list to the Roys' sense of loyalty as a weapon. It is a short 2017 miniseries that aired on BBC Two in Britain and Showtime in the US, so it fits into a single weekend.