Timothy Blake Nelson (born May 11, 1964) is an American actor, writer, and director. His most famous roles include Delmar O'Donnell in O Brother, Where Art Thou?, Dr. Pendanski in Holes, Daniel "Danny" Dalton Jr. in Syriana, Dr. Jonathan Jacobo in Scooby-Doo 2: Monsters Unleashed, Dr. Samuel Sterns in The Incredible Hulk and Captain America: Brave New World, Richard Schell in Lincoln (2012), Buster Scruggs in The Ballad of Buster Scruggs, and Wade Tillman / Looking Glass in the HBO series Watchmen for which he was nominated for a Critics' Choice Television Award.
For Big City Greens, he provides the voice of Bill's father Ernest Green in the episodes "Garage Tales" and "One Hundred".