Libby Purves presents a new live, nocturnal conversation programme, with a very particular connection to the night and nightlife in all its forms.

In this week's programme actress Josie Walker; science writer Henry Nicholls and former gambler Justyn Rees Larcombe join Libby to talk about their lives after dark.

Josie Walker comes to the studio straight from tonight's performance of the West End musical Everybody's Talking About Jamie. The show is based on the real life story of Jamie Campbell, a teenage boy who wants to dress in women's clothes and wear a dress to the school Prom. Josie plays his supportive mother Margaret, a single parent who brings up her son to believe in himself and stand up to bullies. Everybody's Talking about Jamie is at the Apollo Theatre, London.

Henry Nicholls is a science writer who has written a book about his experiences living with the sleep disorder narcolepsy. Through his story and those of his interview subjects (fellow narcoleptics, insomniacs, dreamers and neuroscientists) the book is a tour of the half-lit world of sleep, sleep-disorder and the brain, seen from an autobiographical as well as scientific and cultural standpoint. Sleepyhead: Narcolepsy, Neuroscience and the Search for a Good Night is published by Profile Books.

Justyn Rees Larcombe is a former gambler who gambled secretly online at night as his wife lay sleeping in the next room, unaware of his nocturnal activities. Eventually, he accumulated £750,000 of debt, not all of which was his own money. His addiction cost him his wife, children, home, job and self-respect. He now runs Recovery Two, a charity which helps people who are addicted to gambling.

Producer: Paula McGinley. Show less