In the Season 2 finale of “Defiance,” Nolan tries to save Tommy and stop Irisa before the plan is activated; tensions rise between Amanda and Stahma; the fate of Defiance hangs in the balance. “All Things Must Pass” and “I Almost Prayed” airs back to back on Thursday, Aug. 28, 2014 at 8 p.m. ET/PT on Syfy.