Radio: Pick of the Day:

A KEY QUESTION for our times is Do You Believe in Cher? (7pm R2). The fact that the singer and actress (right) has miraculously avoided the demonisation that usually attends lengthy celebrity is a source of universal wonder. Tonight, she speaks.

There's another chance to hear Andrew Rissik's acclaimed trilogy, Troy (8.55pm R3), which tells the story of Helen, using the voices of, among others, Paul Scofield and Geraldine Somerville.

Between the Ears (11pm R3), a tribute to the Chicago blues pianist Jimmy Yancey, is a spellbinding jumble of sounds and voices - if only more radio programmes were this inventively constructed.