FIRST LOOK: 'Downton Abbey' Final Episode 10 - Lady Mary Confronts Lady Rose About Her Relationship With Jack

'Downton Abbey's final episode airs this Sunday evening. I know - it feels like it's barely started, but here it is, at the end of the fourth series, with Lady Rose finding herself on the sharp end of Lady Mary's tongue for her relationship with Jack Ross. Elsewhere, Anna's tears will be flowing again. Sneaky peek below...