In this episode, we find out what the light in the sky above Glastonbury is and what connection it has to Sir Humphry Davy. From this point on in the story, we are hurtling inexorably towards a terrifying and dramatic climax wherein everything is revealed and all the loose ends are tied up – apart from the ones that are left hanging there for the sequel. I know this, because I have just finished writing it. Yes, you read that correctly. This afternoon, I actually wrote the words “The End”.

Feeling really quite emotional.