I watched 2 of the 8 episodes of Young Sherlock on Amazon Prime Video that started on 4 March 2026. The series is an adaptation of Andrew Lane‘s Young Sherlock Holmes book series, itself a pastiche of Arthur Conan Doyle’s original Sherlock Holmes stories. Guy Ritchie directed the series, and Hero Fiennes Tiffin stars as 19-year-old Sherlock Holmes.

“As a 19-year-old at Oxford University, Sherlock Holmes is not yet the master detective he grows up to be. He is raw and unfiltered, and he lacks discipline. A murder at Oxford puts Holmes’s freedom at risk, and he sets out to solve his first murder mystery that leads him to a global-level conspiracy.”

I like the cast of Young Sherlock: Hero Fiennes Tiffin as Sherlock Holmes

Dónal Finn as James Moriarty, Sherlock’s new friend and future enemy

Zine Tseng as Princess Gulun Shou’an / Xiao Wei, a young Chinese princess, scholar and martial artist with plenty of secrets

Joseph Fiennes as Silas Holmes, Sherlock and Mycroft’s adventurous father

Natascha McElhone as Cordelia Holmes, Sherlock and Mycroft’s artistic mother who suffers grief from the death of her daughter

Max Irons as Mycroft Holmes, Sherlock’s older brother who tries to keep Sherlock out of prison

Colin Firth as Sir Bucephalus Hodge, an wealth industrialist who has some dastardly plans

I can’t wait to watch all 8 episodes! Purists might object to some of the liberties Guy Ritchie takes with young Sherlock, but I’m entertained! GRADE: Incomplete, but trending towards a B+