Streaming service Amazon Prime has unveiled the first trailer for Young Sherlock, a new series from Guy Ritchie that explores the early years of Sherlock Holmes, long before his name became synonymous with deduction.

The lead role is played by Hiro Fiennes-Tiffin, the nephew of actor Ralph Fiennes. In the series, he portrays a 19-year-old Sherlock, just beginning his journey and encountering for the first time a case that will change his life. The story follows the young Holmes as he investigates a mysterious murder in Oxford.

The trailer also introduces one of the key characters — Professor Moriarty, portrayed by Donald Finn. Other cast members include Zhen Zinge, Joseph Fiennes, and Max Irons.

As for the renowned director, Guy Ritchie directed the first two episodes of the series and serves as the show’s executive producer.

The first season of Young Sherlock will consist of eight episodes, with the premiere set for March 4.

Amazon Prime Video has unveiled the first stills from the upcoming detective series Young Sherlock, directed by Guy Ritchie. The project serves as a prequel to Arthur Conan Doyle’s classic stories and follows the very first investigations of 19-year-old Sherlock Holmes.

The series is based on Andy Lane’s Young Sherlock Holmes novels. In the story, the young protagonist takes on a high-profile case – the mysterious murder at Oxford University. His investigation soon leads him into the heart of a far-reaching conspiracy.

The lead role is played by Hero Fiennes Tiffin, who previously worked with Ritchie on The Ministry of Ungentlemanly Warfare. The series will also feature Joseph Fiennes and Natascha McElhone as Sherlock’s parents, Silas and Cordelia. Mycroft Holmes will be portrayed by Max Irons. Other stars joining the cast include Colin Firth, Donal Finn and Zhen Zinine.

The first season will consist of eight episodes. Young Sherlock is set to premiere in 2026, marking Guy Ritchie’s return to the Sherlock universe after more than a decade. He previously directed Sherlock Holmes (2009) and A Game of Shadows (2011), starring Robert Downey Jr. and Jude Law.