Richard William Bull (June 26, 1924 – February 3, 2014) was an American film, stage and television actor. He was best known for his performances as "Doc" on Voyage to the Bottom of the Sea and Nels Oleson on Little House on the Prairie.
Bull fell into acting by accident. “I never gave a serious consideration about becoming an actor. As a senior in high school, I decided to study music, but a friend suggested we attend the Goodman Theater School. In two weeks the friend dropped out, but I was hooked.”[2] There was a three-year interruption while he served as a radio operator for the Army Air Corps, but when he was discharged in 1946 he resumed his acting studies at Goodman.[3]