Anthony North: Utopia (BBC1 – 16 June) took Doctor Who to the end of the universe. It wasn’t quite clear whether this meant the end, meaning edge, or end, meaning finished, but I’ll assume the latter; although it was surprising to find a complete planet at the end, peopled by the remains of humanity. One would expect the ‘end’ to be different to this.Never mind. Anything can be forgiven with Doctor Who. And there was a nice irony that they were building a rocket to save them. It was going to take then to Utopia; which does, of course, mean ‘nowhere.’ Even with the Doctor, there is oblivion in the end. Big bang onwards:The idea of the end of the universe is a natural continuation of it having a beginning in the Big Bang. Here, the universe was created in a moment of time by a sudden expansion of a ‘singularity.’Most people consider the singularity to be a huge ball of matter. Infact, it is nothing more than a mathematical point of infinity. That’s the thing with Big Bang – it is all to do with math.At the point of rapid expansion, basic particles were released into what became the universe. Over time, gravity condensed matter into stars, which exploded in supernova, having cooked heavier particles, which went on to form more stars and planets.At the end of the road: An inevitability of the expansion of the universe is the possibility that it will eventually slow down and stop, thus providing an end. As to the nature of this end, entropy is vital to what could happen.Entropy is the natural predilection towards disorder of a closed system. In other words, everything degrades. This is true from food going bad, to machines eventually giving up. And it is the same with matter.As the end of the universe approaches, all matter will break down into its simplest form, with the universe being nothing but a constant heat throughout. This is known as the Heat Death of the universe, so Doctor Who’s planet could not exist.
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