March 2026 brings a slate of new British TV series, seasons, and films to US streaming and broadcast platforms. Highlights include origin stories for Sherlock Holmes and the Forsyte family, alongside crime dramas and reality shows. These premieres offer viewers a mix of period pieces, mysteries, and contemporary tales.
The British TV Place has announced national premieres for 19 new series, seasons, and movies in the US starting March 1, 2026, along with a new podcast launch. Programs are subject to change, and details cover additions to linear TV and streaming channels.
Among the standout entries is 'Young Sherlock,' an Amazon Original Series premiering globally on March 4 on Prime Video. This action-packed mystery charts the origin of Sherlock Holmes, played by Hero Fiennes Tiffin, as he encounters James Moriarty, portrayed by Dónal Finn, and unravels a globe-trotting conspiracy. The cast includes Joseph Fiennes, Natascha McElhone, and Colin Firth.
'The Forsytes,' inspired by John Galsworthy’s novels, debuts on March 22 at 9pm ET on PBS, with streaming on PBS.org, the PBS app, and PBS Masterpiece Prime Video Channel. This prequel period drama follows a wealthy Victorian family torn between tradition and personal happiness, featuring Stephen Moyer, Jack Davenport, and Millie Gibson.
Another key release is 'The Lady,' a BritBox Original premiering March 18, based on the true story of Jane Andrews (Mia McKenna-Bruce), who rose from working-class roots to become dresser to Sarah Ferguson (Natalie Dormer). The biopic-historical drama explores her fall after a murder conviction. The ensemble includes Philip Glenister and Ed Speleers.
Crime and thriller fans can anticipate 'This City Is Ours: A Crime Family Saga' on AMC+ starting March 6, starring Sean Bean as gang boss Ronnie Phelan, with a power struggle ensuing upon his retirement. 'Mudtown: Season 1' arrives on BritBox March 12, centering on magistrate Claire Lewis Jones (Erin Richards) entangled in past criminal ties.
Other notable premieres include 'Outlander: Season 8' on Starz March 6, concluding the series with Jamie (Sam Heughan) and Claire (Caitríona Balfe) facing family secrets at Fraser’s Ridge; 'Peaky Blinders: The Immortal Man,' a Netflix film with Cillian Murphy as Tommy Shelby in 1940s Birmingham, on March 20; and 'Hope Street: Season 5' on BritBox March 5, a police procedural in Port Devine.
Non-premiere additions feature 'Call the Midwife: Season 15' broadcast debut on PBS March 22, and streaming arrivals like 'Agatha Christie’s Poirot: Seasons 7-8' on Acorn TV March 2. A new podcast, 'On the Box: The BritBox Podcast,' hosted by Edith Bowman and Michelle Collins, launches with episodes featuring Matthew Rhys, Sally Wainwright, and Mia McKenna-Bruce starting March 9.
The Paramount+ lineup for March includes American-focused content like 'The Madison' on March 14 and 'Marshals' on March 1, but overlaps with British elements such as the 1985 film 'Young Sherlock Holmes' added March 1.
