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.

Secrets could be exposed as Rosamund arrives at Downton following Edith's shock departure. Rose is delighted to introduce Atticus and his parents to the Abbey, while Anna and Bates start thinking about a fresh start, now that the worst of their problems are seemingly behind them. Molesley is concerned to see Daisy becoming disillusioned with her studies, and Isobel makes a happy announcement, but there may be trouble on the horizon. Violet has her hands full with her warring servants, while Mary and Blake seize an opportunity to send Gillingham a strong message.