NOVA takes a spellbinding voyage through one of the world's most fascinating and colorful ecosystems: a coral reef, where the line between plants and animals is blurred, "rocks" move, eat and fight, fish farm, and weak animals borrow the shields and weapons of stronger ones.

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.