The first episode sets up the plotline for the entire series, as Sherlock is introduced as a defiant, but charismatic, 19-year-old man who lacks discipline. The premiere episode sees the young ...

Young Sherlock Season 1 has 8 episodes, streaming from March 4, 2026 on Prime Video. Guy Ritchie's series stars Hero Fiennes Tiffin in the detective's origin story full of mystery and action.

Plus, everything we know about Season 2 so far.