Will enters the Sanctuary’s morgue and demands to know who killed Bigfoot; MacRae suggests that Helen is a key suspect. Will visits Helen who states that she has no memory of the past week, and that maybe her memories had been erased. After much investigating, where Helen’s state of mind is brought into question, Henry finds a surveillance video. This tape shows Helen killing Bigfoot. Helen grows more and more alarmed culminating in her escaping from the Sanctuary. Will and Kate give chase and track her to an abandoned facility; she is then arrested and brought back. Henry’s investigations lead him to an abnormal called Big Bertha; at first this being was thought to be dead, but through more searching Henry discovers that mercenaries have captured it. Will and a team stop these mercenaries and then the truth is revealed: Helen had faked her memories in order to trap Emma, who it seems has turned traitor. In a pleasing twist Bigfoot was in on this plan and is very much alive.