3. The Stigmata of Progress

Complete story — includes the ending

Ira, a Castor clone raised outside of the military by Susan Duncan, examines Rachel's new eye. Susan, Charlotte's new guardian, returns to the Island after unsuccessfully attempting to track down Kendall. Kira senses things and she is not happy with people keeping the truth from her. Cosima examines Sarah's bot but they are unsure of its purpose. Alison and Donnie begin to dig up Dr. Leekie's body in the hope that he possesses an implanted bot (as most high level Neolutionists do) for Cosima to study. As they begin to excavate, the police arrive to investigate the murder of Pouchie's drug ring, who were in possession of Vote Alison Hendrix campaign material, forcing Helena to play Alison during the detectives' interrogation. Sarah meets Felix's biological half-sister Adele and immediately doubts her intentions, causing Sarah and Felix to split on bad terms. Alison and Donnie inform Cosima that they killed Leekie and have his bot for her to examine. Art sees on Beth's surveillance video that Detective Duko visited her. Art finds information on the man whose bot exploded (on the video that Sarah saw at the club last episode). With Art's intel, Sarah visits a dental clinic where one of the employees recognizes her as Beth, who previously investigated there. She promises to remove the bot but seemingly pierces it instead, telling Sarah not to move as the toxins will kill her, and claiming that she has contacted her superiors, calling her lucky to be implanted with the technology. Ferdinand arrives instead, killing the dentist and freeing Sarah as she would already be dead had the bot actually been pierced. Rachel learns for the first time that Charlotte was cloned from herself. Rachel gets word to Ferdinand that Susan is alive. Susan, after telling Rachel that she does not love her, apologizes for her detachment and informs her that their purpose is for the greater good; to control human evolution and create a more perfect human being.