“Some say it will end in fire, others say there will be a flood…” So began Horizon’s sobering look at past Armageddon-themed episodes. But why not both? As I was writing this review from a preview DVD, ahead of its original scheduled broadcast on 17 March, news came through that the accident at the Fukushima Daiichi nuclear plant in Japan had been upgraded to a level-six crisis, on a scale of seven. Two thoughts simultaneously occurred to me: firstly, that doing the review was tempting fate. And secondly, that such superstitious, solipsistic thinking was symptomatic of the human race’s primitive ongoing preoccupation with its own destruction.