In 2018, Walter joined the cast of the HBO drama series "Succession," which follows a powerful family-run media empire on the brink of implosion. The series is currently in its fourth and final season and has earned widespread acclaim throughout its run.
Walters plays Lady Caroline Collingwood, a wealthy English aristocrat and socialite once married to Brian Cox's Logan Roy. Together, they raised Logan's firstborn, Connor (Alan Ruck), and three more children of their own — Kendall (Jeremy Strong), Shiv (Sarah Snook), and Roman (Kieran Culkin). She first appears in the episode "Pre-Nuptials," wherein her relationship with her children (especially her daughter) is revealed to be strained by her own insecurities and feelings of abandonment. She last appeared in the Season 3 finale, which saw her undercut her young Roys to secure her and her husband's wealth.
As she explained to Vulture, she sees Caroline's situation with more nuance than the audience, who spend most of their time empathizing with the three Roy children (and occasionally their father). "The audience gets to know the siblings and Logan over many detailed episodes," she said, "and so I hope they'll appreciate what it might be like to be the mother or the wife of any of those people. Rather than thinking of Caroline as the cause of all that, you could also think of her as the person who has to hold her own with them." She is currently set to appear in an upcoming episode of Season 4.