Downtown Abbey TV Series: The Complete Fourth Season. The sweeping Downton Abbey saga continues with a fourth season of drama, romance, and family intrigue. Dame Maggie Smith stars as Violet, the stubborn Dowager Countess of Grantham, matriarch of Downton. Hugh Bonneville stars as her son, the stoic Lord Crawley; Elizabeth McGovern is his American wife, Cora, and Michelle Dockery is their daughter Lady Mary. From Academy Award®-winner Julian Fellowes.