Mills Watson (born William Oscar Watson on July 10, 1940) is an American actor who is probably best known for his role as Deputy Perkins, first on B.J. and the Bear and later on The Misadventures of Sheriff Lobo. He also played Uncle Buster in the sitcom, Harper Valley P.T.A.. Watson has appeared in guest roles in numerous TV series such as Hawaii Five-O, Emergency!, M*A*S*H, The Rockford Files, The A-Team and Murder She Wrote, as well as movies including Papillon, Up In Smoke and Cujo.