threaten to overrun entire communities. the cure? a small and unlikely ban of mild mannered new yorkers committed to taking back their streets. this is richard reynolds. for over 20 years he and a handful of concerned citizens have confronted new york's rat epidemic head on. these are their pets, and by day they chase the ball and fetch the paper and sit quietly on the paper and sit quietly on their master's laps. by night they reconnect with something a bit more primal, a deep seeded desire to hunt and kill rats. check out the newcomer to the group, meeting a rat for the first time. >> watch this! oh, yeah! oh, yeah, good dog. good dog.