Volker Schlöndorff transposes Bertolt Brecht’s late-expressionist work to latter-day 1969. Poet and anarchist Baal lives in an attic and reads his poems to cab drivers. At first feted and later rejected by bourgeois society, Baal roams through forests and along motorways, greedy for schnapps, cigarettes, women and men: ‘You have to let out the beast, let him out into the sunlig…