Documentary profile of the late Spanish cellist, considered by many to be the greatest of all time. Casals's extraordinary career spanned two centuries - he played for both Queen Victoria and John F Kennedy. In 1939 he left Spain in protest against Franco's regime and lived the rest of his life in self-imposed exile, dying in Puerto Rico in 1973 at the age of 97. Omnibus journeys to his native Catalonia in the company of Robert Baldock, as he gathers material for a new biography of the performer. The programme taps the source of his inspiration and talks to Marta, the young cello student Casals married when he was 80 and she was 21.