Carved above the lintel were the words SCIENTIA POTESTAS EST. Science points east, I wondered? Science is portentous, yes? Science protests too much. Scientific potatoes rule. Had I stumbled on the lair of dangerous plant geneticists?

What's the biggest thing you've zapped with a fireball?' I asked. 'That would be a tiger,'said Nightingale. 'Well don't tell Greenpeace,' I said. 'They're an endagered species.' 'Not that sort of tiger,' said Nightingale. 'A Panzer-kampfwagen sechs Ausf E.' I stared at him. 'You knocked out a Tiger tank with a fireball?' 'Actually I knocked out two,' said Nightingale. 'I have to admit that the first one took three shots, one to disable the tracks, one through the driver's eye slot and one down the commander's hatch - brewed up rather nicely.

The Metropolitan Police Service is still, despite what people think, a working-class organisation and as such rejects totally the notion of an officer class. That is why every newly minted constable, regardless of their educational background, has to spend a two-year probationary period as an ordinary plod on the streets. This is because nothing builds character like being abused, spat at and vomited by members of the public.

Despite my mum being from a small village in the middle of a forest, I'm not a country person. I don't like my bacon sandwich to be curiously snuffling at my fingers. But sometimes being police means holding your breath and fondling a pig.

When you're a boy your life can be measured out as a series of uncomfortable conversations reluctantly initiated by adults in an effort to tell you things that you either already know or really don't want to know.

Somebody doesn't know they're not in Kansas anymore,' said Stephanopoulos.

You know, your species [humans] has the most amazing capacity for self-deception, matched only by its ingenuity in trying to destroy itself.