Charlotte made her first appearance in season 4 and often is confused with the captain of police Kate Rogers that had a one night stand with Fet in season 3. In season 4, it is shown that Charlotte had teamed up alongside Quinlan and Fet to try and obtain a nuke. It was later revealed in episode 4x06 Tainted Love that Charlotte wouldn't be going back to New York with Fet and Quinlan. This statement then implied that she was breaking up with Fet in which she did. She then said that she would be living in a cabin that her father had owned.