The Dowager Countess has some of the funniest lines in the show.
"What is a week-end?"
- And, of course, nearly falling over in the swivel-chair:
Lady Grantham: Good heavens, what am I sitting on!?
Matthew Crawley: A swivel-chair.
Lady Grantham: Another modern brainwave?
Matthew Crawley: Hardly. They were invented by Thomas Jefferson.
Lady Grantham: Why does every day involve a fight with an American?
- Right after Matthew and Sir Richard have a fight, following Mary ending the engagement, and deciding to leave Downton Abbey first thing in the morning:
Sir Richard: (to Lady Grantham) I doubt we'll meet again.
Lady Grantham: Do you promise?
- Let's not forget this gem, after Pamuk's death:
Lady Grantham: Of course it would happen to a foreigner. It's typical. No Englishman would dream of dying in someone else's house - especially somebody they didn't even know.