The Brit thesp will star alongside Benedict Cumberbatch and Martin Freeman in the second episode of the upcoming three-part series, which is produced by Hartswood Films.
Episode two will be directed by Nick Hurran, who directed series three “Sherlock” episode “His Last Vow,” which was also nominated for an Emmy.
“I’m excited and intrigued by the character I shall be playing in ‘Sherlock,’” said Jones in a statement.
Co-creator, writer and exec producer Stevan Moffat said: “Delighted to have Toby Jones on board, bringing to life one of Doyle’s finest villains.”
Co-creator, writer and exec producer Mark Gattis added: “We’re thrilled to welcome one of our finest actors to the ‘Sherlock’ family. I know Toby will embrace the part with true relish.”
Last month it was announced that the newest series of “Sherlock” will take place in Blighty again as Doctor Watson and his wife, Mary, prepare for their biggest ever challenge – becoming parents for the first time.
“Sherlock” is written and created by Moffat and Gatiss, and inspired by the works of Sir Arthur Conan Doyle. It is produced by Sue Vertue and the executive producers are Beryl Vertue, Gatiss and Moffat for Hartswood Films, Bethan Jones for BBC Cymru Wales and Rebecca Eaton for Masterpiece. It is distributed internationally by BBC Worldwide.