 During the 1970s Blaxploitation era, Don appeared alongside Fred "The Hammer" Williamson, D'Urville Martin, and Gloria Hendry in such films as "Legend of Nigger Charley, Black Caesar", and "Sugar Hill".Throughout his career, Don made several guest appearances in many popular TV series, including "Adam 12, Night Gallery, Ironside, The Streets of San Francisco, Harry O, Little House on the Prairie, Starsky and Hutch, The Bionic Woman, Fantasy Island," and "The A-Team".However, he is probably best known for his roles of Gideon in the series "Daniel Boone", SRT in George Lucas' "THX 1138", in "Beneath the Planet of the Apes" as Ongaro, and as Sheriff Little in the TV series "Dukes of Hazzard".