The gritty, decadent world that HBO built spills more blood in its final season, the post-Caesar chapter that pits Mark Antony (James Purefoy) against Octavian (Simon Woods). Sweeping battlefield showdowns offer high drama, but the soap-operatic subplots orchestrated by the cunning, stunning, emerald-eyed Atia (Polly Walker) are where the real action is. EXTRAS Five sharp commentaries and four featurettes are a must-watch. And ''All Roads Lead to Rome'' a fact-filled, Pop-Up Video-style option will have you speaking Latin in no time. A

