In this David Cronenberg-helmed biopic, Viggo Mortensen stars as Sigmund Freud, whose relationship with fellow psychology luminary Carl Jung (Michael Fassbender) is tested when Sabina Spielrein (Keira Knightley), one of the first female psychoanalysts, enters their lives. This World War I-set drama also stars Vincent Cassel as Otto Gross, a disciple of Freud, and Sarah Gadon, who plays Jung's psychoanalyst wife.