Jarvis Cocker takes to the streets to peer through stained windows, cold steel bars and Japanese paper screens, to find out just what goes on Behind Closed Doors at night time.

He joins a lock-in where the time bell is never rung, and peers into the deepest recesses of a lock-in brain that belongs to Jack, reliving the night when the doors shut in his brain.

On his nocturnal sojourn Jarvis recalls old times, on the streets of post-industrial Sheffield, and shares the loneliness of the long sentenced prisoner who dreams of empty streets under a full moon.

Take a night walk with Jarvis Cocker; bring a torch. You might find yourself in a dark corner, but you've got a good guide.

Producer: Sara Jane Hall.