TMDb/Young Sherlock TV Dive into Young Sherlock, the hit Prime Video series exploring Holmes & Moriarty's early friendship. Season 2 news revealed! March 13, 2026 AceShowbiz - Young Sherlock, the thrilling new series produced by Guy Ritchie, has quickly risen to the top of Prime Video's charts since its debut on March 4, 2026. The show has captivated audiences with its fresh take on the iconic detective's early years, starring Hero Fiennes Tiffin as Sherlock Holmes and Dónal Finn as James Moriarty.