You probably saw the face but didn't know his name. You also may not have known he was from Aurora and attended SMSU (MSU to you kids) for a short time in the mid-sixties. Don S. Dixon, best known for his roles on the TV shows Twin Peaks and Stargate SG-1, died Sunday of a heart attack at his home in Gibsons, British Columbia. Here is the news report from Canwest News Service.
Here is a very good obit and tribute from the Stargate fans site, as well as his IMDB listing.