Fan Casting

11 years after the events of sg1 earth has been devastated by attacks from alien forces. Corporal Jack Foster is trying to evacuate his family and friends when they happen upon the Cheyenne mountain facility. Managing to get inside the notice that the military inhabitants have all been murdered. They stumble on an video by Samantha Carter detailing how an alien force came through the stargate and murdered everyone 11 years ago and how the mountain was locked down. On this video there are instructions on how to use the stargate and of safe havens. The group move to one of the safe havens (taking as many civilians as possible) when at the safe haven they discover the invaders are of a little known gouald system lord who has flourished since the others were killed. Corporal jack decides to launch and attack on the gouald base on earth and rescue as many humans as possible. This sets up film 2