In an effective presentation combining science fiction with actual scientific research, Alien Invaders: Biodiversity at Risk reveals the gravest danger to biodiversity: invasions of non-native plants and animals that have the ability to alter the balance of nature. A worried young biologist encounters a time traveler from the not-so-rosy future, and together, they discover that a combination of education, research, and community involvement will help to defuse this serious threat to delicate ecosystems. The film is designed to appeal to both student and adult viewers. ~ Alice Day, Rovi