The cast of “Miss Scarlet and the Duke” returns for Season 4, with Eliza Foss and Iain Glen reprising their roles as Lady Emily Scarlet and Detective William Duke. The show’s creator, Rachael Romalis, will once again serve as showrunner and executive producer.

In the first three seasons, the duo tackled a range of intriguing cases, from murder and theft to blackmail and deception. Along the way, they navigated their complicated relationship, which evolved from a tentative partnership to a deep and abiding romance.

In Season 4, Lady Emily and Detective Duke will take on some of their most complex and intriguing cases yet. From a series of gruesome murders in the city’s docklands to a high-stakes heist at a prestigious charity gala, the duo will have their work cut out for them.

The fourth season of “Miss Scarlet and the Duke” is shaping up to be an exciting and engaging installment in the series. With new cases, characters, and challenges, Lady Emily and Detective Duke will have their work cut out for them.