Don Matheson (August 5, 1929 – June 29, 2014), was an American soldier and policeman who later became a television actor, likely best known for his continuing role in Irwin Allen's series Land of the Giants. Don Matheson (August 5, 1929 – June 29, 2014), was an American soldier and policeman who later became a television actor, likely best known for his continuing role in Irwin Allen's series Land of the Giants.