All ten episodes from the fourth series of the Canadian/US sci-fi drama starring Tatiana Maslany as identical women who are revealed to be clones. In this series, Sarah (Maslany) flees from her Icelandic retreat after receiving a warning that Neolution is after Kendall Malone (Alison Steadman). As Sarah tries to learn more about the scientific group, she begins to further investigate Beth (also Maslany)'s final days, with Art (Kevin Hanchard)'s help. The episodes are: 'The Collapse of Nature', 'Transgressive Border Crossing', 'The Stigmata of Progress', 'From Instinct to Rational Control', 'Human Raw Material', 'The Scandal of Altruism', 'The Antisocialism of Sex', 'The Redesign of Natural Objects', 'The Mitigation of Competition' and 'From Dancing Mice to Psychopaths'.