- Writers: John Fawcett, Graeme Manson, Alex Levine, Kim Coghill, Andrew De Angelis, Jeff Detsky, Adam Higgs, Bob Mackowycz Jr., Elize Morgan, Peter Rowley, Rebecca Sernasie
- Stars: Ari Millen , Dylan Bruce , Evelyne Brochu , Jordan Gavaris , Josh Vokey , Kevin Hanchard , Kristian Bruun , Maria Doyle Kennedy , Skyler Wexler , Tatiana Maslany
Cosima and Sarah quarrel over Cosima's obvious interest in neolution and Dr. Leekie's work. Leekie wants Delphine to find the names of the clones Cosina has been in contact with. Alison tells Sarah she and her husband are getting a divorce. She is also certain she knows the identity of her monitor and decides the time has come to get her own back. The police think the body they found in the gravel pit is Sarah and call on Mrs. S to deliver the bad news. As they gather more information, they are baffled by the conflicting evidence. They thought the Jane Doe from the gravel pit was Sarah but they now have evidence that Sarah jumped in front of a train weeks before Jane Doe died. They call on Felix who identified Sarah as the jumper.