Defiance is an American science fiction western drama television series developed by Rockne S. O'Bannon, Kevin Murphy and Michael Taylor; the series is produced by Universal Cable Productions.
The show takes place in a post-apocalyptic future on a radically transformed Earth containing new species, some having arrived from space, many others the result of haphazard contamination by the terraforming technology used by the alien race the Votans, which has transformed native flora and fauna in unforeseen ways. The story begins in the year 2046 when Earth has been considerably changed, with new topography, the extinction of plant and animal species and the emergence of new species. The series follows Joshua Nolan (Grant Bowler) his adopted alien daughter Irisa (Stephanie Leonidas) and the town's new mayor, Amanda Rosewater (Julie Benz) in addition to an ensemble of actors portraying different characters in the growing town. in the city-state of Defiance, built on the ruins of St. Louis.