
Miss Scarlet and The Duke Season 4 is the show’s most decisive run since its debut, full of cohesive, engaging storytelling and long overdue development. While there are ways to go still for a show in this genre, with the anthology storytelling, Season 4 infinitely improves upon Season 3, making every episode more riveting than the one before.
The pacing is fantastic, the performances are more emotionally driven than before, and each case is thoroughly gripping. Four seasons into a show like this, it’s high time we dive deep into more character studies, which creator and executive producer Rachael New doesn’t miss a single beat on. As she mentions in the exclusive with PBS: “Eliza’s got to decide: ‘Do I want to carry on in this kind of small business that I’m struggling with? Or do I want the weight and the clout of the most successful private detective agency in London behind me?’ That opens a box for her, like Pandora’s box.” And as we dive deeper into her mindset, along with the other key players, the show starts to raise every stake possible.’
Miss Scarlet and The Duke Season 4 Suitably Utilizes a Flashback Episode
A flashback episode can often go one of two ways: it can take everything we already know and add a myriad of layers, or it can break the narrative’s flow in a way that doesn’t feel fitting. Thankfully, with Miss Scarlet and The Duke’s “Origins,” it’s the former, taking viewers through the kind of foundation building that’s exquisite in every way—from the writing to the execution and the performances, it’s nothing short of brilliant in its means of showcasing why our leading characters are how they are today. The nuances we get into William and Eliza’s dynamic then and how the series approaches their relationship today make it substantially more evident why they’re each other’s person.
There’s a lot more to unload in these six episodes that we’ll get to in our weekly reviews, but it bears noting that it’s clear there’s still so much left in this endeavor, and the show’s success is one that will (and should) continue. Both William and Eliza still have things to learn individually before they come together as a couple and make it through the challenges of a romantic relationship. Surely, they’re on their way there (and genuinely look hotter than ever this season? Not sure what was in the water, but heart-on-fire emojis all around). Essentially, how this single flashback episode cements the show’s long-running theme of why this job is so important is no small feat. It gives viewers plenty to hold onto, which thus allows the season to pack quite a punch.
The Performances and Writing Are Astounding

It’s important to highlight how incredible the performances are this season. While they’re usually great, both Kate Phillips and Stuart Martin have been with these characters for quite some time now, and this year, the writing gives them chances to ground them even further. There’s far more than meets the eye solely because of what we get in the embodiment, making the season’s best moments feel more impactful. Some characters are highly missed, while Cathy Belton’s Ivy remains the kind of fan favorite we could never get enough of it.
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In more ways than one, the improvements in Miss Scarlet and The Duke Season 4 come from the show’s familiarity and effortless charm. As the writing gives the actors more chances to showcase their character’s quirks, we get better, stronger lived-in performances that continue to improve upon everything. The season is full of impeccably angsty beats of longing, heightened emotions, and exhilarating cases that are fun to solve alongside the characters. It’s one that viewers deserve to see spoiler-free because each new development feels earned and meticulously plotted. The show isn’t making outcomes uncomplicated, but it’s also not making it formidable for the sake of added drama. Instead, it’s diving into real stakes to tell a story that will feel honest, deeply vulnerable, and satisfying on all fronts.
Miss Scarlet and The Duke Season 4 will premiere on Masterpiece PBS on January 7.
First Featured Image Credit: ©Masterpiece

Can’t wait to watch this after such a wonderful review. Thank you very much!
i read a lot of disappointed comments from ppl having watched the entire season 4, esp regarding the relationship between the two leads which seems to get little to no progress, after the s3 big revelation for Wm, at least.
Would you agree on this?
I am not asking for any spoilers, it’s just…reading your review gave me high hopes; then i watched the first episode and was a little confused but still hopeful.
Now i honestly don’t know what to think…
Thanks!
One thing that’s important to remember is that opinions will always be subjective. I really did not like Season 3, but I thought 4 was much better all around. It’s also important to remember that there’s a clear story that writers are trying to tell. We’re being very cautious about not talking about episodes in advance because not everyone has passport, so I will personally be elaborating on certain scenes as the season progresses, along with our weekly reviews.
I believe the way the season is going right means we’re headed in the right direction. William is very much openly showing how much he cares about Eliza and she’s far too stubborn to see it herself, but we are clearly headed to a place where she’s going to see it. The show was always meant to be a slow burn, but I genuinely believe signs are pointing toward us finally seeing the place where that slow burn will become something more. Again, I’ll have much more to say when I can actually talk about specifics!
Thank you very much for getting back to me, it is very kind of you and I genuinely appreciate it.
Thanks for your thoughtful reply as well, it is tremendously helpful and encouraging, and I look forward to reading your thoughts on each of the upcoming episodes.
I truly love your approach and vision and I enjoy reading your work a lot.
Thanks again 🙏
Clivia.
❤️
I have passport and watched all six episodes on Sunday night. I won’t comment on specifics but I am hopeful for a season five since there are important plot lines left dangling. It was interesting to see some major character development and growth to a degree unusual in a show like this one. However, this series has been unusual from the beginning. I hope there is an announcement soon about a season five.
Hum…must confess that comment makes me kinda nervous but tbh from the overall season review here as well as Sophia’s kind reply to my comment, I have the distinct feeling that a S5 is sort of inevitable…having said that, hopefully we get the announcement soon, we’ve all been burned before haven’t we? 😱