Filling In

People in Britain and America have fillings in their teeth, it's natural, surely? Well, no, the metal is mostly mercury, and that's a poison. If dentists put poison into people's mouths, that would be damaging, right? Mickey wants to know, but isn't able to make head or tail of the competing arguments. Then people start getting kidnapped and it all gets personal. Mickey swings into action. After all, he's only doing his job.