The accident at Three Mile Island made front page news all over the world and rocked the entire nuclear power industry. In this special 90-minute broadcast, NOVA presents a docudrama chronicling the minute-by-minute events leading up to the accident and examines the questions raised about safety confronting nuclear power industry today.

Seattle dentist Barney Clark received the first complete artificial heart implant in 1982 and lived on for three post-operative months. NOVA investigates the risk, costs and controversies surrounding the development of the artificial heart.