Development of a television series adaptation of the
Young Sherlock Holmes books written by
Andy Lane was first reported in April 2024 with
Hero Fiennes Tiffin starring as a young
Sherlock Holmes and
Guy Ritchie attached to the project as well.
Amazon Prime Video ordered eight-episodes of the series in May 2024 to be executive produced by Inspirational Entertainment and Motive Pictures. The series was written by
showrunner Matthew Parkhill, who also executive produces. Ritchie directs and executive produces alongside Lane, Simon Kelton, Ivan Atkinson, Simon Maxwell, Harriet Creelman, Dhana Gilbert,
Colin Wilson and Marc Resteghini. Ritchie previously helmed two unrelated cinematic Holmes adaptations:
Sherlock Holmes (2009) and
Sherlock Holmes: A Game of Shadows (2011). The role of the nineteen-year-old Holmes is played by
Hero Fiennes Tiffin, who had previously worked with Ritchie on
The Ministry of Ungentlemanly Warfare. In June, Fiennes Tiffin's uncle
Joseph Fiennes was cast as Sherlock's father, alongside
Natascha McElhone as his mother. In July,
Zine Tseng,
Colin Firth and
Dónal Finn joined the cast.
Max Irons was seen filming scenes in late August, and he was revealed to be playing
Mycroft Holmes shortly afterwards. Filming of the series began in the United Kingdom in July 2024. Scenes were filmed in Bristol. In 2024, filming took place in Spain (specifically
Jerez,
Cádiz and
Seville), and
Cardiff,
Wales. Filming on the series wrapped in late February 2025. A second season is reportedly in production. In April 2026, Amazon Prime Video renewed the series for a second season and it was reported that Ritchie is set to direct the first episode of the season. ==Release==