The door in the back of the cinema was locked from the inside, but they burst it open. The dust on the floor, Ralph saw in the light of their torches, had recently been disturbed. Someone had been in there all right. It smelled funny. Not old and moldy like an ancient building should smell, but clinical, like an old hospital. Except there was nothing. It was a ghostly old building, but there was nothing to suggest a laboratory of any kind. Except the dust was disturbed, someone had been in there. Ralph tried to make sense of their findings, tried to come up with a theory; any theory. Marcus’s lair must be around somewhere, it was the only place he could be. Unless… Unless Marcus was so familiar with the London underground system that he knew the cinema had been built over an abandoned

