Reign 3×12 “No Way Out” – Mary (Adelaide Kane) might have to sacrifice her cousin’s life to save her own, as she and Gideon (Ben Geurens) find themselves in unchartered emotional territory. Catherine’s (Megan Follows) past returns to haunt her, while Lola (Anna Popplewell) and Elizabeth (Rachel Skarsten) become unlikely allies. Craig Parker, Rose Williams, Celina Sinden, Torrance Coombs, Charlie Carrick and Jonathan Keltz also star. Fred Gerber directed the episode written by Wendy Riss (#312). Original airdate 5/2/2016.