For the first time the show was working within an epic landscape. The huge sets and real locations look amazing on screen. The bravery in a children's television programme taking on a post-apocalyptic London in the early 1960s is considerable, but pays off massively. They made the Dalek's even more formidable through turning them into a worldwide threat.

All of non-regular cast in this story are fantastic. It gives you a strong idea of how different characters would react to this kind of invasion. Some would group together, some would screw others over.

Sure, susan's relationship with some random character develops a bit to quickly for most fan's liking. After only a couple of days they have to spend their whole life together, but in the context of a show from this time, I can forgive this. Susan's leaving scene is fantastic, a perfect piece of Doctor Who history. It is always odd to hear the Doctor's famous "one day I'll come back" speech within its original context. The first companion leaves, and the show's mechanism for continual renewal is set in motion.