Meanwhile, Isobel is on the receiving end of some unexpected attention, while Mary asks Gillingham for a favour.
Episode 8 airs at 9pm on Sunday 10 November on ITV.
To whet your appetite, here are ten teasing lines of dialogue from the episode…
» “Once, at the wedding. And that was quite enough.”
» “What in God’s name was that about?”
» “He says he want to marry me.”
» “I hope we’re brave enough for this.”
» “Won’t you defend your principles?”
» “She was… meeting a man.”
» “This is very reckless.”
» “I want to see her face crumble when she finds out.”
» “Rosamund and Edith have some exciting news.”
» “I’m never going to be your mistress.”
> Order Series 4 on DVD on Amazon.
> Buy the complete Series 1-3 boxset on Amazon.
Are you looking forward to the finale? Let us know below…