Widower Gordon Smith died in 2009, leaving behind an estate worth 150,000 pounds. He left a will but it was not properly completed, so now the heir hunters must find living relatives. Michael Gray died alone in 2007 in his home in Kingston and was something of an enigma to his neighbours. But when the heir hunters begin investigating the estate, they learn his father's career with the air ministry had meant that Michael had spent much of his childhood in a remote port in the Yemen. Plus, details of three unsolved cases. Could you be an heir to an unclaimed estate worth thousands or even millions of pounds?