And The Duke - Season 4 | Miss Scarlet

In a twist no one saw coming, the Duke does not fight for Eliza. Instead, he thanks her. He admits that watching her struggle without him made him realize she never needed him—she only needed the confidence he gave her.

This moment defines Season 4. Eliza Scarlet is no longer a girl waiting to be chosen. She is a woman deciding who is worthy of her partnership. By the finale, she kisses Blake—not with passion, but with calculation. It is a kiss of acceptance, not surrender. The final episode brings the Duke back for one crucial scene. William Wellington returns to London to collect his remaining belongings. Seeing Eliza running the agency with Blake by her side, the Duke has a moment of quiet devastation. Stuart Martin plays this with heartbreaking subtlety—a single tear, a forced smile, and a goodbye that feels permanent. Miss Scarlet and the Duke - Season 4

In a gut-wrenching scene via correspondence, Eliza writes to the Duke in New York, confessing her struggles. He writes back—solicitous but distant—proving that the Atlantic Ocean is wider than just geography. The episode masterfully uses silence; the absence of the Duke’s booming voice in her office is a character in itself. In a twist no one saw coming, the

This was a high-risk gamble for the writers. The "will-they-won't-they" tension was the emotional engine of the show. By removing the Duke, Season 4 forces a brutal question: Is Eliza Scarlet a detective because of the Duke, or in spite of him? The season opener wastes no time establishing the new status quo. We find Eliza drowning. Not literally, but financially and emotionally. Without the Duke’s unofficial protection, her male clients are evaporating. The police force, led by a new antagonist, Detective Inspector Fitzroy (played by a menacing Cal MacAninch), views her as a nuisance. This moment defines Season 4

The game has changed. For three seasons, fans of the hit PBS Masterpiece series Miss Scarlet and The Duke have been hooked not only by the intricate Victorian-era whodunits but also by the tantalizing, slow-burn chemistry between its two titular characters: the fiery, independent female detective Eliza Scarlet and the stoic, rule-bound Scotland Yard Inspector William "The Duke" Wellington.

For those willing to let go of the past, Season 4 offers the sharpest writing, the highest stakes, and the most authentic portrayal of a single, working woman in the 19th century since Victoria . Stream it on PBS Masterpiece or Amazon Prime Video. Just bring tissues—not for the mystery, but for the goodbye.

That threat is The Crimson Alliance , a shadowy syndicate of corrupt industrialists and police officers. Fitzroy is a member. Blake used to work for them. And Eliza, unknowingly, is hired to investigate a crime that leads directly to their door.