Season 9 reveals that Carter left SG-1 to work at Area 51 after the collapse of the Goa'uld power structure. After Lieutenant Colonel Cameron Mitchell assumes command of SG-1, General O'Neill orders Carter to assist SG-1 on a mission concerning the new Ori threat. Carter officially rejoins SG-1 in the season 9 episode " Ex Deus Machina ". Samantha Carter appears in the 2008 direct-to-DVD films Stargate: The Ark of Truth and Stargate: Continuum.