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TV series Mystery

Young Sherlock

TV series2026

Sherlock Holmes hasn't become the detective everyone knows yet. In Young Sherlock, a murder case puts his own freedom at risk. Hero Fiennes Tiffin plays the younger Holmes, with Dónal Finn as a James Moriarty he's only just getting to know.

Where to watch Young Sherlock (2026)

United States

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A viewing guide to Young Sherlock

Original context, checked against this title’s facts and the sources below. Streaming listings are dated separately above.

Before the familiar Baker Street life

The first season starts in 1870s Oxford and takes Sherlock into a conspiracy that reaches beyond England. Guy Ritchie directed its first two episodes, but Fiennes Tiffin is the Holmes you're following here, with a new cast around him. The eight-part opening season focuses on his early case and his meeting with Moriarty. You're watching those identities take shape, rather than dropping into an established detective's usual run of cases.

Editorial context checked Oct 25, 2026 · How this guide is prepared

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