Gadd, Jamie Bell, Stuart Campbell and Mitchell Robertson star in a tale of stepbrothers who spend decades on a destructive, and self-destructive, journey.

I first encountered Richard Gadd in 2016. He was clad in pink lycra and running on a treadmill for the whole hour of his Edinburgh Fringe show.

His semi-autobiographical breakthrough series, Netflix’s Baby Reindeer, concerns a comedian who is stalked by a mentally ill woman but can’t bring himself to seek help.