<Tr> <Th> 184 </Th> <Td> 22 </Td> <Td> "#6" </Td> <Td> Karen Gaviola </Td> <Td> Breen Frazier </Td> <Td> May 15, 2013 (2013 - 05 - 15) </Td> <Td> 822 </Td> <Td> 10.56 </Td> </Tr> <Tr> <Td_colspan="8"> When two couples are found dead in Detroit, the BAU surmises that the unsub is forcing his victims to fatally stab each other . Meanwhile, Blake contemplates her future with the team after her husband James (D.W. Moffett) returns home with a life - changing proposition . </Td> </Tr> <Tr> <Th> 185 </Th> <Td> 23 </Td> <Td> "Brothers Hotchner" </Td> <Td> Rob Bailey </Td> <Td> Rick Dunkle </Td> <Td> May 22, 2013 (2013 - 05 - 22) </Td> <Td> 823 </Td> <Td> 11.01 </Td> </Tr> <Tr> <Td_colspan="8"> As the BAU investigates a series of apparent ecstasy overdoses in Manhattan, Hotch struggles with his personal demons when his estranged brother Sean is caught in the middle . Meanwhile, the Replicator prepares to make his next move . </Td> </Tr>

Who is stalking the bau in season 8