Miss Scarlet (titled Miss Scarlet and The Duke in series 1–4) is a British-American period television crime drama created by Rachael New. It stars Kate Phillips (Eliza Scarlet) as the title character, a Victorian era private detective.

The first series debuted on Alibi in the United Kingdom on 31 March 2020, and premiered in the United States on 17 January 2021, as part of PBS's Masterpiece anthology series. A second series was announced by PBS on 29 March 2021. It premiered on Alibi in the UK on 14 June 2022, and on PBS in the US on 16 October 2022. Series three, four, and five all first premiered on PBS, with series 3 on 8 January 2023; series 4 on 7 January 2024; and series 5 on 12 January 2025. Series 5 marked a turnover for the series: Stuart Martin had departed the show in series 4, and his character William "the Duke" Wellington was written out. The show's fifth series was retitled "Miss Scarlet" as a result. Tom Durant-Pritchard took a replacement role as Inspector Alexander Blake. A sixth season is confirmed to be in production.