Perfect Disaster is a one-hour American documentary television mini-series that ran from March 19 until April 9, 2006 on the Discovery Channel. The program depicted the worst-case scenario that major cities could expect in the near future if hit by extreme disaster. A large part of each episode was recounted the lives of citizens from each city, with the remainder of the program showing many real-world scientists discussing the very high probabilities of these disasters. The trademark tagline of the show was "When the conditions are right, it will all go wrong."