'Young Sherlock' trailer teases action-heavy origin story for iconic detective and we're already hyped

Prime Video drops a high-octane 'Young Sherlock' trailer teasing Holmes’ early days and a deadly conspiracy ahead of its release.
PUBLISHED FEB 5, 2026
Screenshot of Hero Fiennes Tiffin as Sherlock Holmes in a still from' Young Sherlock' trailer (Cover image credit: YouTube | Prime Video)
Screenshot of Hero Fiennes Tiffin as Sherlock Holmes in a still from' Young Sherlock' trailer (Cover image credit: YouTube | Prime Video)

Prime Video dropped an action-packed new trailer for 'Young Sherlock' ahead of the series's March release. The clip begins with Hero Fiennes Tiffin introducing himself as the titular character as he gets into a series of brouhahas. The upcoming series is based on Andy Lane’s 'Young Sherlock Holmes' novels.

While he promises to stay out of trouble, the iconic detective is oblivious to the fact that he would be walking into a dangerous murder mystery linked to a larger crime. The new footage, spanning just over two minutes, promises to be a high-octane origin story for Tiffin's Holmes. All eight episodes will premiere on the streamer on the same day.

The official logline for the series 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 will expose the early antics of the anarchic adolescent who is yet to evolve into Baker Street's most renowned resident."

The rest of the cast includes Zine Tseng, Joseph Fiennes, Max Irons, Dónal Finn, and Colin Firth. Created by Guy Ritchie, the behind-the-scenes personnel see EPs Gilbert, Marc Resteghini, Matthew Parkhill, Simon Maxwell, Colin Wilson, Ivan Atkinson, and Simon Kelton, along with showrunner Matthew Parkhill. Tiffin spoke about playing the cult detective in a conversation with Collider, "Because I’ve grown up loving Sherlock, so I appreciate it if anyone does another one, I’ll watch it, and I’ll be the kind of person that goes, 'I think Sherlock might have been a bit different. So, I understood the pressure because I’d be on the other side too if it were someone else playing the role."

"There were those nerves, but it was excitement too, and an honor and privilege to play the character," he further added. "But you’re right. I’d be lying if I didn’t say that I felt some sort of responsibility. I felt like there was a mark to hit. You can’t just say it’s a completely fabricated character. He is how he is. People are going to have an idea of an expectation they have. And I don’t think there’s a better man for the job than Guy. I just trusted him so much. It was a pleasure. I’m really, really excited for people to see what we’ve done."

Ritchie's latest comes after the 2009 movie 'Sherlock Holmes' starring Robert Downey Jr. and Jude Law. A sequel, 'Sherlock Holmes: A Game of Shadows', followed in 2011. Both movies were critical and commercial successes. Now, the latest gets a TV series-style treatment, focusing on Holmes' formative years. At the time of writing, the streamer has greenlit the show for one season, but renewing it for a second instalment shouldn't necessarily come as a surprise.

'Young Sherlock' premieres with all eight episodes on March 4.

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