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 stars Grant Bowler, Julie Benz, Stephanie Leonidas, Tony Curran, Jaime Murray, Graham Greene, Jesse Rath and James Murray.

William Atherton and Anna Hopskins' castings were announced on September 5, 2013 while season 2 was in production.

[15] James Murray joined the main cast as Defiance's new mayor Niles Pottinger.

[15] Season one guest star Robin Dunne returned as two different characters.