An Arkfall crash salvage mission led by Nolan leads to danger in the form of an alien race he has never encountered before; at the same time, Stahma makes a shocking power play after she's admonished by church elders for her growing sense of female empowerment; and Irisa begins confessing her deep, dark secrets to Tommy.moreless
A stalker comes after Amanda, raising concerns for both Nolan and Niles.
Irisa is arrested upon her return to Defiance, but Nolan can arrange her release by capturing those responsible for an explosion that nearly killed Mayor Pottinger. Meanwhile, Stahma decides the only way to stay in control of her family's criminal enterprises is by ensuring that Datak stays behind bars.moreless
While Defiance citizens cast their votes for mayor, Irisa must decide whether to accept her destiny and Nolan faces his past.
On the eve of the mayoral election, Nolan and Amanda both come under fire when the Lawkeeper is involved in an accident.
A plague strikes down the residents of Defiance. The people blame the Irathients and place them under quarantine, while Nolan and Connor must confront the E-Rep soldiers to get the cure.
Defiance receives a visitor: an astronaut from the year 2013 who has the potential to destroy the town.
Kenya is among several people that are mysteriously abducted. Meanwhile, Rafe tries to determine who gave his dead son the golden device that may have led to the boy's death.