‘Young Sherlock’ trailer: Hero Fiennes Tiffin turns crime-solving detective in Guy Ritchie’s origins series

Hero Fiennes Tiffin embodies a young, action-packed Sherlock Holmes in Guy Ritchie’s new series, ‘Young Sherlock’. The eight-part show, premiering March 4, 2026, plunges into the detective’s early, turbulent years, uncovering a globe-trotting conspiracy. This bold reimagining promises an irreverent mystery, setting the stage for the legendary Baker Street resident.