fun times with caligula

Roleplaying something like this, think about it. 
The Master travelled back in time and decided to have fun in Roman Empire, and he created Caligula, as a sort of holiday -between a planet and another one.-
The Doctor was travelling alone and he went to Rome, in a period of history in which nobody could see him. 

So, a little bit of caos and a lot of Best Enemies.