John Noble (born 20 August 1948) is an Australian actor. He is known for his roles as Denethor in the Lord of the Rings film trilogy, Dr. Walter Bishop on the science fiction series Fringe, Henry Parrish on the action-horror series Sleepy Hollow, and Morland Holmes on the police procedural Elementary. Noble has also done voice work as Leland Monroe in the video game L.A. Noire, Unicron in the animated series Transformers: Prime, and Scarecrow in the DC Comics video game Batman: Arkham Knight.