John Noble is an Australian actor. He is best known for his roles as Dr. Walter Bishop in the US Fox science fiction television series Fringe, and Henry Parrish in the Fox action-horror series Sleepy Hollow. His highest profile film role was as Denethor in Peter Jackson's The Lord of the Rings trilogy. He also provided the voice of the DC Comics supervillain Scarecrow in the 2015 video game Batman: Arkham Knight, where his character served as the main antagonist. Additionally, he voiced and provided motion capture for his role in the 2011 video game L.A. Noire. In 2015, he joined the main cast of the television series Elementary as Sherlock Holmes's father. He was also cast as a doctor in the Australian TV series All Saints. In 2012, Noble was diagnosed with osteoporosis. His charity, Noble Bones, helps to raise awareness of the disease.