There is chemistry aplenty between Richard E Grant and Elizabeth McGovern, perhaps because they previously played a married couple in the BBC's Scarlet Pimpernel series in 1998. Their Downton characters - art expert Simon Bricker and Lady Cora - have grown close over the past few weeks, and their flirting reaches boiling point in the latest episode. She's enjoying the attention he gives her, but is he about to cross a line - and does she want him to? Cora's eldest child, Mary, is also enjoying male company, this time that of Charles Blake, who's about to do her a big favour. Meanwhile, Rose meets a dashing stranger, Branson makes up his mind about Sarah Bunting and Anna is disturbed by a visit from Inspector Vyner.