<Tr> <Th> 14 </Th> <Td> </Td> <Td> "Governed as It Were by Chance" </Td> <Td> David Frazee </Td> <Td> Russ Cochrane </Td> <Td> May 10, 2014 (2014 - 05 - 10) </Td> <Td> 224086 - 12 </Td> <Td> 0.484 </Td> </Tr> <Tr> <Td_colspan="8"> Cal and Sarah hide the car and the assumed - dead Daniel . Sarah leaves Kira with Cal and returns to Mrs. S's home with Felix, where they find news clippings of Susan and Ethan Duncan, the founders of Leda and the cloning project and Rachel's adoptive parents . Mrs. S, meanwhile, reunites with Carlton Redding, who helped smuggle her and Sarah out of London . Helena escapes from the ranch after Henrik's daughter Gracie tries to kill her and remembers that Henrik took something from her . Alison wakes up in rehab . She is told by Donnie that she will not see her children unless she stays a week . Sarah sneaks into Rachel's apartment, only to be captured by the very much alive Daniel . As he tortures her, Helena arrives and kills Daniel . At the ranch it is revealed that Henrik took Helena's egg cells for in vitro fertilization . </Td> </Tr> <Tr> <Th> 15 </Th> <Td> 5 </Td> <Td> "Ipsa Scientia Potestas Est" </Td> <Td> Helen Shaver </Td> <Td> Tony Elliott </Td> <Td> May 17, 2014 (2014 - 05 - 17) </Td> <Td> 224086 - 14 </Td> <Td> 0.510 </Td> </Tr> <Tr> <Td_colspan="8"> Rachel has Paul replace Daniel as her monitor and lover, while also withholding a stem cell treatment from Cosima . Despite this, Leekie plans to treat Cosima anyway . He later confides in Cosima that the original clone genome was lost in a lab fire; the genome would have provided the cure for the illness . Meanwhile, Paul, under Rachel's orders, storms in on Felix and gets his fingerprints on Daniel's gun to frame him for the police officer's murder . He gives Sarah until morning to produce Kira . Sarah places Helena in Art's custody so she can learn more about the Proletheans . Helena escapes, but provides Art and Sarah with clues to the location of Maggie Chen's locker . There, the two find clues relating to Ethan Duncan's location and realize that Helena intends to assassinate Rachel . Sarah finds Helena and talks her out of killing Rachel, and under Leekie's promise that he will drop the charges against Felix, the two set off to find Ethan . </Td> </Tr>

What is the last episode of orphan black