Arvo Oswald Ojala (February 21, 1920 – July 1, 2005) was a Hollywood technical advisor on the subject of quick-draw with a revolver. He also worked as an actor; his most famous role was that of the unnamed man shot by Marshal Matt Dillon in the opening sequences of the long-running television series Gunsmoke. As a joke on the producers, James Arness and Arvo actually did the opener once with Dillon falling to the ground. His wife Doris (née Seversen, 1925–1978) preceded him in death. He is survived by his children Valerie, Jon, Erikk, Inga, and Kym.