The fifth of six programmes from the Bristol Arts Unit investigates some of the mysteries of rock 'n' roll. XTC is a four-man rock group from Swindon, who spent a weekend in August at The Manor - a manor house near Oxford now established as a 'living-in' recording studio - making their new single "Towers of London". Shadowed by television cameras and microphones, the members of XTC - Andy Partridge, Colin Moulding, Terry Chambers, Dave Gregory - and their producer Steve Lilliwhite expound and demonstrate the complexities of multi-track recording.