Sherlock Holmes will soon find a new ally: Justified star Jacob Pitts will guest-star in an upcoming episode of Elementary, EW has learned exclusively.
Pitts, whose credits also include Eurotrip and Person of Interest, will play Paul Ettinger, a brilliant and wealthy mathematician who assembles a team of his fellow math geniuses to help identify a killer that Holmes and Watson are tracking. Pitts will appear in the same episode as the returning Mad Men star Rich Sommer.
Elementary returns Oct. 30 at 10 p.m. ET on CBS.