The Great War is over and a long-awaited engagement is on, but all is not tranquil at Downton Abbey as wrenching social changes, romantic intrigues and personal crises grip the majestic English country estate. The international hit, written by Julian Fellowes, stars Dame Maggie Smith, Elizabeth McGovern and Hugh Bonneville, with guest star Shirley MacLaine.Change arrives in a big way for several key characters at Downton Abbey. A yearly cricket match with the village sees old scores settled and new plots hatched.