Narrator in “Unfinished Business”

Once more, the Ambulocetus is lying in her path - but she instinctively knows he is dead. Today the Leptictidium is the survivor, but ironically, the future holds a different outcome for these mammals. The Leptictidium and her kind are destined to become extinct when this hot wet world gets cooler and drier, and the world's forests start to disappear. Ambulocetus is the one with the big future. He is the ancestor of the whales, the most magnificent dynasty of mammals. And mammals are about to take over the world!