Day 221: The Invasion Episode 2

And this episode marks a very important addition to the mythos of Doctor Who, with the introduction of UNIT. They're a military organisation who investigate strange goings on, essentially meaning alien interference with the affairs of Earth. Their introduction allows for a sense of organisation with regards to the modern day stories for Doctor Who. Suddenly, stories that are set in the modern day will already have a set of allies in place, meaning that the audience will be able to latch onto new stories more easily. This is something that was explored, again, in The Web of Fear, which had Professor Travers as a recurring character from a previous adventure. This time, there's another recurring character, in the form of Brigadier Alistair Gordon Lethbridge-Stewart. How he works as a character we'll deal with several times over the course of the next couple of years, including, perhaps, tomorrow's entry...