The second series of programmes featuring Steve Punt in his role as private investigator, examining little mysteries that perplex, amuse and beguile. In these three episodes, he looks into persistent rumours that Hitler was intending to set up his command headquarters in Balham; goes on the trail of TV detector vans, investigating rumours that the vehicles are little more than a myth and turns the spotlight on mind control, entering a murky work of government intelligence, military secrecy and wild speculation.