Matthew Parkhill Creator, Executive Producer Hero Fiennes Tiffin Sherlock Holmes Actor Dónal Finn James Moriarty Actor Zine Tseng Princess Gulun Shou'an Actor Joseph Fiennes Silas Holmes Actor Natascha McElhone Cordelia Holmes Actor Max Irons Mycroft Holmes Actor Colin Firth Bucephalus Hodge Actor Guy Ritchie Executive Producer Dhana Rivera Gilbert Executive Producer Marc Resteghini Executive Producer Simon Maxwell Executive Producer Ivan Atkinson Executive Producer Simon Kelton Executive Producer Colin Wilson Executive Producer