“Religion is an illusion,” writes Sigmund Freud in his “New Introductory Lectures on Psychoanalysis,” delivered in 1933, “and it derives its strength from its readiness to fit in with our instinctual wishful impulses.” Not exactly a glowing endorsement of faith. If you’ve ever wondered how a debate might have gone between Freud and his contemporary C. S. Lewis, the leading Christian intellectual of his time, wonder no longer. Freud’s Last Session, a new film directed by Matthew Brown, imagines the meeting for us. Anthony Hopkins stars as Freud, who seeks out Lewis (Matthew Goode) as he braves the agony of oral cancer. It’s September 1939 and W.W. II has just begun. Both the looming conflict and the trauma inflicted on Lewis during the Great War cast shadows on the subjects they discuss, which include Christ, myth, and the foundations of their beliefs. —Jack Sullivan