Christiaan Barnard's advances in heart transplants have divided the medical profession and provoked controversy around the world. In this special edition, Professor Barnard answers questions from an invited studio audience and tackles the moral and scientific issues that have dogged his work.

As revealed in a 21st anniversary edition of Tomorrow's World, only 25 of the first 100 patients to undergo a heart transplant lived more than a few months.

↗ Originally broadcast 16 July 1969.