Miss Scarlet And The Duke - Season 4 | 2026 |

Eliza’s rival-turned-associate who leaves her in charge of his agency. An eccentric analyst providing invaluable background intel. Where to Watch Season 4

. The story begins with Eliza Scarlet (Kate Phillips) taking over the London office of the Nash & Sons Detective Agency Miss Scarlet and the Duke - Season 4

Season 4 introduces Detective Inspector Alexander Blake (Tom Durant Pritchard) as the Duke’s replacement. Crucially, the writers avoid replicating the old dynamic. Blake is not threatened by Eliza; he is intrigued by her methodology. Eliza’s rival-turned-associate who leaves her in charge of

Nash is accused of murder, and Eliza must find the real killer to save him. Cast Members as Eliza Scarlet Stuart Martin as William "The Duke" Wellington Felix Scott as Patrick Nash Cathy Belton as Ivy Woods Evan McCabe as Detective Oliver Fitzroy Paul Bazely as Clarence (New accountant) Curtis Kantsa as Gabriel (New cast member) The story begins with Eliza Scarlet (Kate Phillips)

Outside of work, the season continued to explore the intricate, will-they-won’t-they relationship between Eliza and William “Duke” Wellington (Stuart Martin), a dynamic that has captivated audiences since the series began. The season built towards a , a tension that served as an emotional anchor for the entire run of episodes. This emotional weight was masterfully interwoven with a new caseload of grisly and politically sensitive crimes across Victorian London.