I feel like a bit of a creeper pointing this out, but I think the "talking dog" bit is a rather grim reference to David Berkowitz, aka the Son of Sam, who claimed a demon in the shape of his neighbour's dog told him to kill people in a bid for an insanity plea.

This was a goddamned master class and Peter Capaldi is a fucking treasure.

Have we ever seen them both in the same room?

But where will he be tomorrow?

Brazaliens.