In the summer of 1959, Fuller guest-starred as young outlaw, Buck Harmon, in the episode "The Friend" on the ABC/Warner Brothers western series, "Lawman." In the story line, Harmon is estranged from his minister father, played by Robert F. Simon. When the outlaw gang comes into Laramie, Buck switches sides to help his old friend, Deputy Johnny McKay (Peter Brown). In the shootout, Harmon is gunned down, but his father is spared. That same year Fuller also appeared as Davey Carey in another Lawman episode titled "The Souvenir."