Warning: this article contains spoilers for episode six of The Undoing.

Nicole Kidman and Hugh Grant’s tense psychological thriller, The Undoing, reached its conclusion yesterday (10 November). Following the story of a high-profile murder among New York’s elite, it’s been a tense whodunnit ride. After plenty of twists and turns, endless theories and paranoia (in both the characters and viewers), it turned out that Elena’s murderer was… Jonathan.

Ah yes, it was the person we were led to believe it was from the start.

The Undoing finale: why did we find it so hard to believe Sylvia was just being a good BFF?