Hero Fiennes Tiffin (The Ministry of Ungentlemanly Warfare) will reprise his role as the world’s most famous fictional detective in a new season of Young Sherlock. Prime Video’s officially renewed the mystery series for season two and confirmed Guy Ritchie’s returning as director and executive producer.
Season one premiered on March 4, 2026. The streamer hasn’t announced a target date for season two or revealed a cast list. In addition to Hero Fiennes Tiffin, the first season starred Dónal Finn (The Wheel of Time), Zine Tseng (3 Body Problem), Joseph Fiennes (The Handmaid’s Tale), Natascha McElhone (Halo), Max Irons (Condor), and Colin Firth (Lockerbie: A Search for Truth).
“Young Sherlock has that rare magic—millions of fans around the world aren’t just watching a detective story, they’re falling in love with the origin of an icon,” said Peter Friedlander, Head of Global Television, Amazon MGM Studios. “Guy Ritchie and Matthew Parkhill have cracked the code on making Sherlock’s early years feel fresh, dangerous, and utterly addictive and have introduced a compelling take on James Moriarty that sets the stage for what’s to come. We can’t wait to see where they take him next in season two.”
Showrunner Matthew Parkhill created the series and serves as an executive producer along with Marc Resteghini, Dhana Rivera Gilbert, Simon Maxwell, Ivan Atkinson, Simon Kelton, Colin Wilson, and Harriet Creelman.
Prime Video hasn’t released a synopsis of season two. Season one’s synopsis reads:
“When a charismatic, youthfully defiant Sherlock Holmes meets none other than James Moriarty, he finds himself dragged into a murder investigation that threatens his liberty. Sherlock’s first-ever case unravels a globe-trotting conspiracy, leading to an explosive showdown that alters the course of his life forever. Unfolding in a vibrant Victorian England and adventuring abroad, the series exposes the early antics of the anarchic adolescent who is yet to evolve into Baker Street’s most renowned resident.”