The BBC said today that Toby Jones will play the villain in Season 4 of Sherlock. The veteran actor, who starred on the British series The Secret Agent and Detectorists, plays a scientist on Fox’s Wayward Pines and voiced the elf Dobby in a pair of Harry Potter films, will join the mystery drama in the second of its three new 90-minute episodes.

No details about the character were released, but co-creator, writer and EP Steven Moffat said, “Delighted to have Toby Jones on board, bringing to life one of [Sir Arthur Conan] Doyle’’s finest villains.”

Season 4 of the Emmy-winning Sherlock will begin with Holmes (Benedict Cumberbatch) back on British soil as Dr. Watson (Martin Freeman) and his wife, Mary (Amanda Abbington), prepare for parenthood. The series is written and created by Steven Moffat and Mark Gatiss and produced by Sue Vertue. The executive producers are Beryl Vertue, Mark Gatissm Steven Moffat, Bethan Jones and Rebecca Eaton.