Sydney went to the real CIA with her knowledge of SD-6, and was recruited by the CIA into working as a double agent to bring down SD-6. Her handler, Agent Michael Vaughn, and who is her ongoing love interest on the show, gives her missions from the CIA. She soon learns that her own father is a double agent as well. During her time at SD-6, Sydney performed missions with Marcus Dixon, who sometimes became suspicious that Sydney was a double agent. Dixon was still under the impression that SD-6 was part of the U.S. Government. Sydney had to balance all these new revelations with keeping all these secrets from her friends, notably Will Tippin and Francie Calfo.