Tonight's Viewing: What We Learned

The TARDIS punishes people pissing around by making them sound Welsh. Clearly it has a sense of humour.
The Romans were aware of the concept of modern art two millenia before the modern age. Of course, the TARDIS might just have heard the Latin for "Pointless shit" and done its beset to translate.
Earthquakes can be interpreted as a sign of the Gods' approval, although what such people would consider a sign of dissatisfaction is hard to guess.
Magma can be neutralised with a bucket of water. Presumably Pompeii could have been saved if only the Romans had had access to garden hoses.
Always carry a water-pistol with you. You never know when you might need to badly sting a rock-based alien life-form.
Time Lords can see the flux of the universe, live for centuries, and subconsciously choose to hide in cupboards holding alien supercomputers on a weekly basis.
The fiery destruction of your own city is a spectator sport.