Kim Hyun Joong's drama 'City Conquest' was originally scheduled for a time slot with KBS but was recently rejected for what the production company is claiming "government intervention". In a press release, they detail all of the demands KBS made, including switching out script writers, editing the scripts, switching out parts of the cast, etc, which they all complied with out of pressure.
In the end, KBS decided to drop the drama all together after a certain switch of power in the higher ups. "KBS officials told us that the reason they could not air the drama was because despite its superior content and business potential, the depiction of violence was not the right fit for a time when the government is making a new start."
KBS came out with their own statement saying that their claims are unfounded. "The drama features too much violence and revenge themes and makes a mockery out of the police. We thus felt that it was inappropriate for broadcast."