Trapped on board the Earth ship Prometheus in season 7's " Grace ", Carter realizes that her feelings for O'Neill stop her from exploring other romances. Two episodes later in Chimera, Carter begins dating her brother's friend Pete Shanahan, but Pete disrespects her privacy and the confidential nature of her work. Pete gaslights her and stalks her until she is forced to disclose her job to him. In the season 8 premiere, " New Order ", Carter gets captured by a humanoid Replicator named Fifth she had first encountered in season 6's " Unnatural Selection ". Fifth eventually releases her, but keeps a replicator copy of her, known commonly as ' RepliCarter '. Upon O'Neill's promotion to brigadier general in the same episode, he promotes her to lieutenant colonel. Carter assumes command of the SG-1 team, which includes the de-ascended Daniel Jackson, the alien Teal'c, and herself. Shortly after the death of her father in late season 8, Carter breaks up with Pete and goes fishing with Jack, Daniel, and Teal'c to celebrate the defeat of the System Lords.