The Infinite Monkey Cage

Radio 4, 4.30pm

Physicist Brian Cox and comedian Robin Ince kick off their 22nd series with a discussion about how the world might end. They’re joined by astrophysicist Katie Mack and cosmologist Brian Greene as well as two bona fide comedy legends – Eric Idle and Steve Martin (above).

New four-part series How To Play (Radio 4, 9am) begins with a fly-on-thewall insight into cellist Sheku KannehMason’s preparations for a performance of Elgar’s Cello Concerto with the City Of Birmingham Symphony Orchestra.

In Walks Like A Duck (Radio 4, 11am), therapist Louise Halling describes living with muscular dystrophy.