[s9e19] The Edge Of Winter -

: Morgan eventually realizes that Joe Bachner did not have a male partner as initially suspected. Instead, Daria herself had developed extreme Stockholm Syndrome and assisted Bachner in torturing and killing other captives.

: Aasha Davis as Daria Samsen and Emayatzy Corinealdi as her sister, Ellen. Director : Hanelle Culpepper. [S9E19] The Edge of Winter

: The BAU initially investigated a series of ritualistic stabbings in Hamilton, New York, where victims were found with precise puncture wounds from an ice pick and "displayed" like scarecrows. : Morgan eventually realizes that Joe Bachner did