Bradford Claude Dourif is best known to current filmgoers as Grima Wormtongue from Peter Jackson's Lord of the Rings trilogy (2001-03). However, his earliest notable role was a quarter of a century before that as the occasional sidekick of Randall P. McMurphy, Jack Nicholson's anti-hero protagonist of One Flew Over the Cuckoo's Nest in 1975. He has since appeared in over 150 shows and movies, including a pivotal core role in Deadwood as Doc Cochran, and a recurring run on Star Trek: Voyager as homicidal Crewman Lon Suder. He played Bernie Bethel on the USA Network hit series Psych in the episode "Shawn, Interrupted".
In the episode "Shawn and Gus Truck Things Up", Shawn describes Lassiter's dilapidated practice baby as having "Brad Dourif hair."