Monsieur de Talleyrand-Perigord was Napoleon's Grand Chamberlain and Foreign Minister. Before that, he was a bishop and aristocrat. He was also made the Prince of Benevento.
He prevented the Second Doctor and Serena from being arrested as spies in 1815. The Doctor then took him with them to 1865 to see the results of the Countess' scheme. They found that Napoléon Bonaparte had conquered Europe and had then died of pneumonia. The continent fractured into warring city-states, each ruled by a separate Player. They were captured by the Countess' troops, but managed to escape and return to 1815. The glimpse of the future convinced Talleyrand to help them stop the Countess from succeeding. (PROSE: World Game)