Bertha Russell’s relentless climb to the top of New York society finally reaches a tipping point in the fourth season of The Gilded Age. As the Russell family grapples with the fallout of Bertha’s social gambles, Agnes van Rhijn seizes a prime opportunity to reclaim her family's waning influence, while Marian and Peggy must navigate their own paths toward independence in an era where the cost of ambition has never been higher.