Malebolgia

 was the 51st state of the United States of America, proposed around the year 2001. It was located in the southeastern mainland, formed from the division of a pre-existing state. Alistair Gordon Lethbridge-Stewart was sent there, after having helped establish the devolved parliament of Scotland, in order to offer the fledgeling state his experience and expertise.

The prime candidate for the first Governor was Brigham Elijah Dashwood III, an evangelist and politician who was also running the newly opened Brigham Elijah Dashwood Laboratory of Alternative Mentalities -- a mental hospital. Behind the scenes, the hospital was a front for the newly re-formed Hellfire Club, which was working to ensure Dashwood's election with the help of the demon Marchosias.

The Eighth Doctor and Charley Pollard became involved with the Laboratory and the Club, and subsequently exposed Dashwood's activities, ending his political career. (BFA: Minuet in Hell)


 * There is no further mention of Malebolgia in any other context, suggesting that Dashwood's discredit may have killed the state's final ratification.