The London Event was only the beginning, or so Colonel Alistair Lethbridge-Stewart believed. Until he was ordered to meet with Air Vice-Marshal Ian Gilmore. It began in 1963 – for Gilmore, at least. But the alien codenamed Cosmic Hobo visited Earth a lot earlier than that. It’s not only Lethbridge-Stewart who wishes to learn the truth of these visits. He is being watched, and soon Lethbridge-Stewart and Gilmore find themselves in the deserted tunnels of the London Underground chased by a familiar furry form…