Storyville goes inside San Quentin jail to investigate a transformative fitness programme. Plus: a frog-phobic gardener faces his fear. Here’s what to watch this evening

10pm, BBC Four
The 1,000 Mile Club is a running group inside San Quentin state prison, California, in which inmates serving life sentences are coached by a group of volunteer elite athletes to run an annual marathon within the facility’s walls. This powerful film follows the men training in the grounds (“The yard is the only place you can wear clothes that don’t say ‘prisoner’”) and examines the transformative power of the club. Hollie Richardson