The Castle Raiders

Plot
The Seventh Doctor takes Ace to a Motte and Bailey castle to increase her gamer skills. However, they get caught in a Norman attack and they are captured and are held in a cell, awaiting execution. Ace trys to escape using Nitro 9, but she accidently sets the castle on fire. They escape from the Normans, but Ace passes the Cheetah Virus on to the knights and are mistaken for a deity and they become the new king and queen. Suddenly, the real king appears and are chased out and fired from a catapault because they are 'sorcerers'. However, they are holding onto a time ring and arrive at a modern day museum. Back at the castle, the Normans wonder at the TARDIS and open it and are shocked at the large interior, and claim it to be the 'sorcerer's ship'. They activate a control and the TARDIS fades off into the vortex...