Created by Matthew Parkhill.
Young Sherlock premiered on March 4, 2026.
Distributed by Amazon Prime Video.
Young Sherlock (2026) Review
Young Sherlock is an exciting mystery drama that explores the early life of the famous detective.
Hero Fiennes Tiffin plays a young Sherlock Holmes who is still learning how to use his sharp mind.
When a strange crime happens at Oxford, Sherlock begins a dangerous investigation that changes his life.
The series mixes mystery, action, and friendship as Sherlock discovers who he can trust.
With strong performances, beautiful settings, and clever clues, the show keeps viewers interested from start to finish.
Fans of detective stories and the world of Sherlock Holmes will likely enjoy this fresh and entertaining origin story.
CR Rating: 8/10.
Young Sherlock Actors
Hero Fiennes Tiffin as Sherlock Holmes
DOB: November 6, 1997.
Bio: English actor and model born in London, England.
He comes from a prominent acting family, his parents are film director Martha Fiennes and cinematographer George Tiffin, and his uncles are actors Ralph Fiennes and Joseph Fiennes.
Role: Tiffin plays a younger version of the legendary detective Sherlock Holmes.
The series explores Sherlock’s early years before he becomes the iconic consulting detective.
This version of Sherlock is intelligent but still developing his famous deductive skills.
Episodes: 8 eps.
Interesting facts: Hero Fiennes Tiffin previously worked alongside his uncle Ralph Fiennes in the Harry Potter franchise, though they did not share scenes.
Notable works: After film series, First Love, Harry Potter and the Half-Blood Prince (young Tom Riddle).
Dónal Finn as James Moriarty
DOB: August 31, 1995.
Bio: Irish actor born in Cork, Ireland.
He trained at the prestigious London Academy of Music and Dramatic Art (LAMDA) in London, where he developed a strong foundation in classical theatre and screen acting.
Role: Finn portrays a young version of the infamous criminal mastermind Professor James Moriarty.
Initially introduced as a fellow student and intellectual equal to Sherlock Holmes, Moriarty appears charismatic, witty and socially magnetic.
Episodes: 8 eps.
Interesting facts: Finn joined the cast of The Wheel of Time in its second season, replacing actor Barney Harris in the role of Mat Cauthon.
Notable works: The Wheel of Time, Fantastic Beasts: The Secrets of Dumbledore.
Zine Tseng as Princess Gulun Shou’an
DOB: January 1, 1994.
Bio: Taiwanese actress born in Tamsui District, New Taipei City, Taiwan.
She spent parts of her youth in Taiwan, China, and the United States and later studied theatre at the University of Southern California’s School of Dramatic Arts.
Role: Tseng plays Princess Gulun Shou’an, a brilliant Qing-dynasty royal studying abroad at Oxford.
Highly educated and trained in martial arts, she becomes a key ally to Sherlock Holmes.
Episodes: 7 eps.
Interesting facts: Tseng landed her breakout role in 3 Body Problem after auditioning while studying at USC, eventually being selected from thousands of candidates for the part of young Ye Wenjie.
Notable works: 3 Body Problem (Netflix), stage and TV work.
Joseph Fiennes as Silas Holmes
DOB: May 27, 1970.
Bio: English stage and screen actor born in Salisbury, Wiltshire, England.
He trained at the Guildhall School of Music and Drama before beginning his career in theatre with the Royal Shakespeare Company.
Role: Fiennes plays Silas Holmes, the father of Sherlock Holmes.
Silas is portrayed as an adventurous and intellectually curious man whose past expeditions and complicated personal choices leave a lasting mark on his family.
Episodes: 6 eps.
Interesting facts: The real-life family tie (Joseph is Hero’s uncle) added an extra layer to their on-set relationship and was noted by press as a sweet but intense working dynamic.
Notable works: Shakespeare in Love, The Handmaid’s Tale, Enemy at the Gates, American Horror Story: Asylum.
Natascha McElhone as Cordelia Holmes
DOB: December 14, 1969.
Bio: English actress born in London and trained at the London Academy of Music and Dramatic Art (LAMDA).
She built a long career across British and American film and television, becoming widely known for roles in films such as The Truman Show and Ronin.
Role: McElhone plays Cordelia Holmes, Sherlock’s mother.
The series portrays her as a devoted mother, artist, and matriarch of the Holmes family.
Through Cordelia, the show explores Sherlock’s upbringing and family dynamics.
Episodes: 8 eps.
Interesting facts: Critics pointed to her scenes as the show’s emotional backbone; she was cast to ensure the family beats felt lived-in rather than purely plot-driven.
Notable works: The Truman Show, Designated Survivor, Halo, The Crown.
Max Irons as Mycroft Holmes
DOB: October 17, 1985.
Bio: English actor and the son of acclaimed actor Jeremy Irons and actress Sinéad Cusack.
He built his career through historical dramas and political thrillers.
Irons is known for his roles in the period drama The White Queen and the spy thriller series Condor.
Role: Mycroft Holmes is Sherlock’s older brother and one of the most influential figures in his early life.
In the series, Mycroft is more disciplined and politically connected than Sherlock.
Episodes: 7 eps.
Interesting facts: Mycroft plays a key role in bringing Sherlock to Oxford and pushing him toward a more disciplined path during the early events of the story.
Notable works: The White Queen, Condor.
Colin Firth as Sir Bucephalus Hodge
DOB: September 10, 1960.
Bio: An Academy Award-winning English actor widely respected for his performances in historical dramas and character-driven films.
His career includes iconic roles such as Mr. Darcy in Pride and Prejudice and Mark Darcy in the Bridget Jones’s Diary film series.
Role: Sir Bucephalus Hodge is a powerful Oxford University dean whose authority and influence shape the academic environment surrounding Sherlock.
His position places him at the center of key events that trigger the mystery Sherlock becomes involved in.
Episodes: 5 eps.
Interesting facts: Early reviews highlighted Colin’s scenes as tonal anchors amid the show’s swagger and action.
Notable works: The King’s Speech, Pride and Prejudice, A Single Man.
Holly Cattle as Edie / Beatrice Holmes
DOB: N/A.
Bio: British actress known for her work in television and stage productions.
She is part of a new generation of UK performers building careers through supporting roles in television dramas and theatre.
Role: Edie, also known as Beatrice Holmes in parts of the story, is a mysterious figure connected to the Holmes family.
Her presence introduces new questions about Sherlock’s family past and adds layers of intrigue to the unfolding mystery.
Episodes: 7 eps.
Interesting facts: Showrunners described Edie as a role that requires a “chameleon” actor; Holly’s stage instincts helped sell sudden tonal shifts.
Notable works: UK theatre and early TV roles.
Numan Acar as Esad Kasgarli
DOB: October 7, 1974.
Bio: German-Turkish actor and producer known for appearing in international television and film productions.
Born in Köthen, Germany, he has built a career playing complex supporting characters in political thrillers, action films, and global dramas.
Role: Esad Kasgarli is a mysterious figure connected to the larger conspiracy surrounding the central mystery.
Operating from the shadows, Esad moves through international networks.
Episodes: 7 eps.
Interesting facts: Before becoming an actor, Acar studied civil engineering and later founded the German production company Acar Film.
Notable works: Homeland, Aladdin, The Great Wall.
Scott Reid as Constable Lestrade
DOB: N/A.
Bio: Scottish actor known for his work in British television and film.
He gained wider recognition for his performance in the historical drama series The Last Kingdom.
Role: Constable Lestrade is a police officer who occasionally works alongside Sherlock during investigations.
As a practical lawman, Lestrade provides an official policing perspective while navigating Sherlock’s unconventional methods.
Episodes: 5 eps.
Interesting facts: The series plays Lestrade less as a foil and more as a pragmatic ally, giving Reid room to add humanity to the role.
Notable works: UK television guest roles and supporting parts.
Ravi Aujla ‘as’ Professor Kishore Malik
DOB: N/A.
Bio: British actor known for his work across television, film, and theatre in the UK.
Over the years he has appeared in a variety of supporting roles, often portraying professionals such as academics, doctors, and authority figures.
Role: Professor Kishore Malik is an Oxford academic who becomes one of the influential figures in Sherlock’s university life.
As a respected scholar, he represents the intellectual environment that shapes Sherlock’s early investigative thinking.
Episodes: 7 eps.
Interesting facts: The production leaned on real Oxford consultants to make lecture and research scenes feel authentic.
Notable works: Doctors, The Bill.
Purdy Hughes as Young Beatrice
DOB: N/A.
Bio: A young British actress who has begun appearing in television productions.
As an emerging performer, she represents a new generation of child actors.
Role: Young Beatrice appears in flashback sequences connected to the Holmes family storyline.
Through these scenes, the series explores key moments from Sherlock’s past and the events that shape his emotional development.
Episodes: 7 eps.
Interesting facts: Promotional materials emphasized Purdy’s role as the emotional linchpin of several opening episodes.
Notable works: Emerging credits; this series is a breakout role.
More Actors
• Stephen Agnew as Nathan Burford.
• Ian Midlane as Professor Ambrose Roberts.
• Simon Delaney as Detective Fitget.
• Adam James as Dr. Charles Maltby.
• Rachel Shelley as Anna Tilcott.
FAQ – Young Sherlock (2026) TV Series
What is Young Sherlock about?
Young Sherlock follows 19-year-old Sherlock Holmes as he begins his first major investigation while studying at Oxford. After being framed for a murder, he must solve the case to prove his innocence, uncovering a global conspiracy along the way.
Is Young Sherlock based on a book?
Yes. The series is inspired by the Young Sherlock Holmes novels written by Andrew Lane, which explore Sherlock Holmes’ early life and adventures before becoming the famous detective.
How many episodes are in Season 1?
Season 1 of Young Sherlock consists of 8 episodes, each running about 43 to 55 minutes.
Where can I watch Young Sherlock?
The series is available exclusively on Amazon Prime Video, where all episodes premiered on March 4, 2026.
Conclusion
Young Sherlock offers a fresh and engaging look at the early life of the famous detective Sherlock Holmes.
The series blends mystery, suspense, and character growth as a young Sherlock learns how to trust his instincts and solve complex crimes.
With a strong performance from Hero Fiennes Tiffin and an intriguing storyline set in a historic academic world, the show keeps viewers curious about what will happen next.
Overall, it is an entertaining origin story that both longtime Sherlock fans and new audiences can enjoy.