Nicole Kidman and Hugh Grant star in this 2020 miniseries as a wealthy New York couple whose lives are upended by a violent death and a web of secrets. What is the title of this HBO psychological thriller?

The 2020 HBO miniseries featuring Nicole Kidman and Hugh Grant as a seemingly perfect New York couple whose lives unravel after a violent death and a cascade of dark secrets is titled The Undoing (Review). This gripping psychological thriller captivated audiences with its intricate plot and stellar performances, becoming HBO's most-watched show of 2020.

The six-episode series is based on Jean Hanff Korelitz's 2014 novel, "You Should Have Known," and was brought to the screen by David E. Kelley, the acclaimed writer and producer behind "Big Little Lies," another successful HBO project starring Nicole Kidman. Danish director Susanne Bier helmed all episodes, bringing a distinctive visual style to the affluent Upper East Side setting. Viewers were particularly drawn to the show's suspenseful narrative, which kept the identity of the killer a closely guarded secret until the finale.

Beyond the central mystery, The Undoing garnered attention for its lavish production design and memorable costumes, particularly the distinctive autumnal coats worn by Nicole Kidman's character, Grace Fraser, which sparked considerable discussion among fans. The miniseries also featured a notable musical element, with Kidman herself performing a haunting rendition of "Dream a Little Dream of Me" for the opening credits, a task she initially approached with some reluctance. Its consistent audience growth throughout its run was a rare achievement, marking it as the first HBO original series to see an increase in viewership each week.