Department of Internal Security

The Department of Internal Security was set up by the Mysterious Somebody in 1992, following his appointment as head of the PPC. It was tasked with protecting the integrity of HQ, but under the leadership of the Bracket Fungus, soon became a secret police force with sinister intentions. DIS agents were referred to as "Guards", for obvious reasons.

During the period known as the Reorganisation, the DIS were expelled from HQ. The former members of this Department became the Black Cats, while their place in the PPC was taken by three new Departments -- the Department of Internal Affairs, the Department of External Security, and the Department of Internal Operations. They invaded HQ seven years later, but were mostly wiped out. Any surviving members of the Black Cats/DIS are presumably no longer a threat.