Bunk Bed Radio 4, 11pm

This Is Spinal Tap and The Simpsons star Harry Shearer (right) joins Peter Curran and Patrick Marber for more late-night musings in the dark. The conversation concerns startling examples of how live audiences change and shape performances, respect for burrowing animals and the death of manners.

The John Moloney Show (Radio 4, 11.15pm) returns for a fifth run. The stand-up is joined by special guests as he shares his thoughts on neighbours and no-quibble policies at the Stand Comedy Club in Edinburgh.

Free Thinking (Radio 3, 10pm) is a special programme marking tomorrow’s Holocaust Memorial Day.