Elizabeth McGovern, for it was she, played Bonneville's wife in the short-lived Freezing in 2008, and also has previous playing a woman from the period as a companion in The House of Mirth. She wasn't bad, I thought, and looked rather good in the costume she wore on the first occasion when we saw her with Dame Maggie.
Overall I thought the production was very good - looked and sounded fantastic but.....
the device of the servant being our eyes and ears is rather hackneyed. Fellowes did the same thing in Gosford Park with Kelly Macdonald's character, Mary.
and Maggie Smith plays the same panto dame character in virtually everything she does these days - for Violet, Countess of Grantham read Constance, Countess of Trentham.
5/5 for the look of it. 3/5 for the script and cast