And though it’s true, like all the other guests at the convention, I’ll be selling the pictures I’m signing, I liken fans to pilgrims, and pilgrims have a tradition of being ripped off. Getting robbed on the way to Mecca or Canterbury, then sold terrible statues and other religious souvenirs when they get there, is an integral part of the pilgrim experience. And when I meet people who are nearly fainting because they’ve walked from Birmingham to meet me and pay tribute, I realise that for some of them, that experience borders on the religious.

Tom Baker blogs for Blockbuster.