As well as all the regular features, including weekly gig guide, raider of the lost archive with Mark Swarzentruber, and your musical notes and queries, today Suzy takes as her theme the number five, and considers some of the many ways it crops up in music. With references from Schubert to Louis Jordan (achieving the pleasing inclusion of trout and chickens in today's programme!) and music by Mozart, Sibelius, and a sarcastic comment by Prokofiev. And what's your favourite musical fifth? Let us know! [email protected].