We share our first impressions of the second season premiere of Orphan Black, "Nature Under Constraint and Vexed." Stephanie tries to keep an overly-excited Kris on topic. In the premiere, Sarah is on the run and pursued by relentless adversaries. Kira is missing, and Sarah suspects that Rachel is responsible for her daughter's disappearance so she plots a showdown. Meanwhile, Delphine tells Cosima to consider Leekie's job offer, and Alison tries to move on with her life.