The world’s most famous detective has a new origin story. Young Sherlock premiered on Prime Video on March 4, 2026, introducing viewers to a teenage Sherlock Holmes during his formative years at Oxford University. Starring Hero Fiennes Tiffin as the brilliant but troubled young detective, the series explores how Holmes developed the razor-sharp deductive skills, social detachment and relentless pursuit of truth that would later define him.
If you’re wondering how many episodes there are, who plays Moriarty, or how to watch on DIRECTV, here’s everything you need to know.
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‘Young Sherlock’: Quick Facts
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Premiere Date: March 4, 2026
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Episode Count: 8 episodes (Season 1)
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Genre: Period mystery / detective drama
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Setting: 1870s Oxford, England
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Starring: Hero Fiennes Tiffin, Dónal Finn
What Is ‘Young Sherlock’ About?
Set in 1870s Victorian England, Young Sherlock follows a teenage Sherlock Holmes as a student at Oxford University. Long before Baker Street and Dr. Watson, Holmes is already displaying extraordinary powers of observation, along with the social awkwardness and intellectual intensity that define his adult persona.
The series explores:
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Holmes’ early investigative cases
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His evolving deductive methodology
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His complex academic and personal relationships
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The origins of his rivalry with James Moriarty
Unlike traditional Sherlock adaptations that focus on fully-formed genius, this series shows the detective in development; brilliant, flawed and still discovering the limits of his intellect.
Is ‘Young Sherlock’ Connected to the Original Sherlock Holmes Stories?
The series is inspired by Sir Arthur Conan Doyle’s legendary character but presents an original origin story not directly depicted in the original canon.
While Holmes’ university years are not extensively covered in Doyle’s works, the show expands the mythology by imagining:
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His early intellectual influences
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The beginning of his rivalry with Moriarty
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The formative experiences that shaped his later investigative style
For longtime Sherlock Holmes fans, the series offers expanded lore. For newcomers, it works as a standalone mystery drama.
Where to Watch ‘Young Sherlock’
Young Sherlock is exclusively available on Prime Video.
Watching Through DIRECTV
DIRECTV customers can access Prime Video by installing the Prime Video app directly on to your Gemini device.
Learn how to add Prime Video here!
This makes it easy to binge weekly episodes without switching platforms.
How Many Episodes Are in ‘Young Sherlock’?
Season 1 consists of 8 episodes, released weekly beginning March 4, 2026, on Prime Video.
Each episode runs approximately 50–60 minutes, blending character-driven drama with intricate mystery plots.
‘Young Sherlock’ Cast and Characters
Who Plays Young Sherlock Holmes?
Hero Fiennes Tiffin stars as Sherlock Holmes. Known for his role in The Kissing Booth series, Tiffin brings a layered performance that balances intellectual brilliance with emotional vulnerability.
Who Plays Moriarty in Young Sherlock?
Dónal Finn portrays James Moriarty, reimagined as a fellow Oxford contemporary whose intellectual rivalry with Holmes begins during their university years.
Supporting Cast
The series also features:
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Oxford professors and administrators who influence Holmes’ development
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Fellow students who challenge and support him
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Early allies who foreshadow Holmes’ future investigative partnerships
Why ‘Young Sherlock’ Stands Out
Unlike modern reimaginings like BBC’s Sherlock, this adaptation embraces its Victorian setting. The series leans into:
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Period-authentic atmosphere
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Psychological character development
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Academic intrigue and intellectual competition
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Slow-burn mystery storytelling
The Oxford setting provides a rich historical backdrop that distinguishes it from other Sherlock adaptations.
Ready to Start Watching?
If you enjoy intelligent mystery dramas, historical settings and character-driven storytelling, Young Sherlock delivers a fresh take on one of literature’s most iconic detectives.
DIRECTV’s integrated streaming experience makes it simple to access Prime Video and explore a full catalog of premium detective dramas.
Learn more about DIRECTV streaming packages and start watching today.
Frequently asked questions
When did Young Sherlock premiere?
The series premiered on Prime Video on March 4, 2026.
Is Young Sherlock based on a book?
The show is based on the Sherlock Holmes character created by Sir Arthur Conan Doyle, but it tells an original origin story not directly adapted from a specific novel.
How many episodes are in Season 1?
Season 1 includes 8 episodes.
Is Young Sherlock appropriate for teens?
The show is a period mystery drama with thematic intensity but avoids excessive violence, making it suitable for older teens and adults.
