In Season Four of Miss Scarlet and The Duke, Eliza is running a London-based detective agency. Things are not going entirely smoothly, although help comes from some familiar sources. Outside work, her relationship with William (The Duke) builds towards a looming decision that will shape both their lives.
![Photo of Miss Scarlet; Text: Masterpiece; 8pm; GBH 2; Miss Scarlet and The Duke](https://cdn.grove.wgbh.org/dims4/default/54223df/2147483647/strip/true/crop/1500x847+0+0/resize/960x542!/quality/90/?url=https%3A%2F%2Fk1-prod-gbh.s3.us-east-2.amazonaws.com%2Fbrightspot%2F18%2F97%2F2d8396464d6194dcbe3ff5cf0012%2Fmu-1-28-24-miss-scarlet-and-the-duke.png)