David Cronenberg isn't necessarily the first director you'd expect to make a movie about the war of wills between two trailblazing 19th-century psychoanalysts, although on further reflection the idea starts to make sense. Cronenberg's movies have always featured plenty of disturbed individuals, so it stands to reason that he would not only know the work of Sigmund Freud and Carl Jung but that he would ultimately become fascinated by the flaws and faults of the men themselves. The resulting film, 'A Dangerous Method,' out today in limited release from Sony Pictures Classics, asks what happens when two men committed to curing humanity of its mental diseases encounter destructive forces within themselves. Michael Fassbender plays Jung, the idealistic Austrian heir to Freud's legacy, who slowly becomes acquainted with -- and, at least temporarily, possessed by -- his own dark side. Freud, portrayed with an air of ironic wit by erstwhile 'Lord of the Rings' swashbuckler Viggo Mortensen, is the vain, impatient mentor who evolves over time into a disapproving rival.