From a press release from SyFy:
Revolutionary Transmedia Event Marks First-Ever Convergence of Television and Online Gaming
NEW YORK – January 7, 2012 – Syfy’s highly-anticipated Defiance will have its series premiere Monday, April 15 @ 9pm with a two-hour episode (culminating in a total of 12 episodes/13 hours). Defiance, an unprecedented approach to storytelling, will unite scripted television and online gaming for the very first time. Both the series and the game feature an interconnected world and storylines that will launch in early April with the release of the game and continue seamlessly with the series premiere on the 15th.
The show stars Grant Bowler and Julie Benz and is expected to be a big hit.