David Miller is recurring character in the second, third and fourth seasons. He is portrayed by actor Chris Shields. David Miller is a former inhabitant of the Ark. He survived the crash landing to Earth. He continues to work for the Guard as Chief Guard. He has a son, Nathan, who was one of the original 100 sent down to see if Earth was habitable. After Nathan was trapped in Mount Weather, David was the most vocal advocate for a search party.