chunk: In Manhattan, cockroaches are spreading the deadly "Strickler's disease" that is claiming hundreds of the city's children. Entomologist Susan Tyler uses genetic engineering to create what her colleague (and husband) Peter Mann and she call the Judas breed, a large insect that releases an enzyme which causes the roaches metabolism to speed up and starve themselves to death. It successfully kills off the disease. The released population was all-female and designed with a lifespan of only a few months, so that it would only last one generation.