The first season of the American science fiction television series Defiance premiered on Syfy on Monday April 15, 2013 and ended on July 8, 2013 with a total of 12 episodes. The show stars Grant Bowler, Julie Benz, Stephanie Leonidas, Tony Curran, Jaime Murray, Graham Greene and Mia Kirschner.

The second season of the American science fiction television series Defiance premiered on Syfy in its new Thursday night timeslot June 19, 2014 and ended on August 28, 2014. The show consisted a total of 13 episodes. The show stars Grant Bowler, Julie Benz, Stephanie Leonidas, Tony Curran, Jaime Murray, Graham Greene, Jesse Rath and James Murray.