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Young Sherlock Holmes: Moriarty's Unexpected Origin
19 Dec, 2025
Summary
- Hero Fiennes Tiffin stars as a young Sherlock at Oxford.
- Sherlock's first case involves a murder and global conspiracy.
- Young Sherlock's arch-nemesis, Moriarty, is introduced as a friend.
Premiering on March 4, "Young Sherlock" introduces a teenage version of the iconic detective, portrayed by Hero Fiennes Tiffin. The series unfolds in 1870s Oxford, where Sherlock's promise to his mother to stay out of trouble is quickly broken. His academic life is soon consumed by investigating a break-in, leading to his first major case.
This inaugural investigation plunges Sherlock into a murder mystery and a globe-trotting conspiracy that forever alters his path. The series also establishes a crucial early relationship, introducing James Moriarty, not as an adversary, but as a new friend, setting the stage for their complex future dynamic.
Executive produced by Guy Ritchie, the series boasts a notable cast including Dónal Finn as Moriarty and Natascha McElhone as Sherlock's mother. The narrative promises to explore the anarchic adolescent antics of the future Baker Street resident before his legendary career took shape.
