The following afternoon, they all meet up at Walkers warehouse and discover his secret weapon: an old fire engine. Unfortunately they learn too late that Wilson had arranged for The Verger to be the agent as Mrs Pike couldn't decide her outfit. As they are about to set off, they hear the air raid siren, which Frazer points out will help their credibility. While travelling in the old fire engine, everything is going smoothly according to plan, but they don't realise that the Verger was caught loitering near the compound, looking for the crates that had been cleared away. They are pulled over by Hodges, who tells them that a real fire is happening, forcing them to the rescue.