Orphan Black (2013)

S4E4 From Instinct to Rational Control

Sarah comes to the realization that her objectives now coincide with those of her former adversary, leading her to establish a fragile partnership aimed at confronting Neolution's leadership. Simultaneously, Alison sends Felix and Donnie on a mission to penetrate a Neolution fertility clinic that Beth had previously looked into. In the lab, Cosima and Scott are horrified by an unsettling package Alison sends their way. Meanwhile, as Rachel deepens her bond with Charlotte, Susan Duncan presents Rachel with a heart-wrenching choice that could alter everything.