In 'Dial M for Mayor', a mysterious conspiracy is uncovered that was attempting to force Mayor Weldon, Castle's close friend, out of office. The attempt to smear him for embezzlement backfired when a young woman named Laura Cambridge discovered the fact and she was killed. During the case, the mysterious man once again contacts Castle and asks to meet. When they do, he helps him solve the case. However, he later reveals that the conspiracy aimed at the Mayor would have forced Castle out of the 12th Precinct because no one would force Captain Gates to retain him. The man said that they needed Castle to remain at Beckett's side because he was the only one able to keep her away from her mother's case. Castle promises that he will uphold his end of the deal to keep Beckett away from the case.