In part two of a two-part special presentation, NOVA reports on the trials to determine whether the new drug Interleukin-2—the first to make use of the body's own disease-fighting strategy—will live up to its promise as a pivotal cancer breakthrough. Breast cancer claims the lives of four American women every hour. Jane Pauley of NBC News hosts and narrates this NOVA report on stepped-up efforts to reduce the death rate from this all-too-common killer.

It was a blustery day in December 1986, and the New England Coast was in the midst of a winter storm, accompanied by strong on-shore gales and an unusually high tide—conditions perfect for stranding whales in the confined shallows of Cape Cod. NOVA recounts this tragic episode and the happy surprise ending for the young whales who survived after being nursed back to health by the New England Aquarium in Boston.