Bettany Hughes's three-part series profiles three very different thinkers - Buddha, Socrates, and Confucius - and assesses the major contribution they have made to different philosophical and religious traditions.      Content-wise, the programs are extremely good: Hughes interviews several experts in Buddhism, classical philosophy, and Confucianism; and visits several of the ancient sites associated with all three of them. Although the arguments are sometimes difficult to follow - especially in the Buddhist program - they are crisply advanced…