When you read the account of a murder - or, say, a fiction story based on murder - you usually begin with the murder itself. That's all wrong. The murder begins a long time beforehand. A murder is the culmination of a lot of different circumstances, all converging at a given moment at a given point. People are brought into it from different parts of the globe and for unforeseen reasons. [...] The murder itself is the end of the story. It's Zero Hour.”

He paused.

“It's Zero Hour now.

Agatha Christie