Thor and Loki are defined by each other.

We pull on to the road, where our only company are the wandering cattle, who have become commonplace as traffic lights. Lethargic and listless, they look like they've been roaming the roads of Guinea since the dawn of time. And no doubt they will continue to long after we're gone.

Loki in 'Thor' is the most incredible springboard into a sort of excavation of the darker aspects of human nature. So that was thrilling, coming back knowing that I'd built the boat and now I could set sail into choppier waters.

Within us there is the capacity of being anyone or anything

I had huge fun with Chris Evans, as Captain America, because super-soldier though he may be, he's still a man, up against a God who in his own mind is infinitely superior. Then, in the ring with The Hulk, we've got this silver tongued, lightening quick mind up against the embodiment of rage..Loki has this mercurial, transformative ability, not just physically but intellectually, so not all the fights are purely physical. Mind games? Maybe.

I personally feel that people feel very reassured by nature because it makes us feel small and that's a good thing for human beings and for society.

I fundamentally believe that in the moral balance of the human race, we right ourselves. If we feel like the ship's keel is off, we find a way to steer ourselves through the storm repeatedly.