This was the episode I originally watched when I was 15; I didn't see the rest of Miracle Day because my parents then banned me from watching it, but I remember hugely enjoying this episode.

And at 24 (NB: I am now 28), I still do now. It sets up a really interesting premise; I really love the idea of people just suddenly not dying on one single day on Earth, and it's made even more intriguing when Captain Jack becomes mortal as a result.

It's such a thought-provoking idea, and this episode does a great job at setting it up for the rest of the series. We get a nice brief philosophical look at the ramifications of such an event when PC Andy and Gwen are looking at the news reports on the computer too: the point that if people just didn't die, the population would go up and that it could result in serious food shortages. This is brilliantly countered by Rhys's argument that most people would probably make in the circumstances: could it not be a good thing if people suddenly refused to die?

There's a truly epic action sequence in the last half of this episode too, which involves Gwen shooting down a helicopter with a bazooka. That has got to be one of the most badass moments in the entire show.

Overall, this first episode certainly has a different feel to the rest of Torchwood, but I still love it.