Honestly, most of us watching will have our ancestry grounded solely here in the UK. It's such a pitty that in this fourth series they're once again abandoning the possibilities to research in this country, instead going abroad to research that which few of us will ever be able to apply to ourselves.
Simon G is falling into the trap that someone does every time this series comes on air. Much as it may disappoint some Rootschatters, the programme is not made for would-be genealogists (though it was the spur that got me started, like many others), it is made for a general audience. And I'm sure the general public finds trips to exotic locations overseas a lot more interesting than the minutiae of searching parish registers, etc.
In this specific case, I also wish there had been more time to follow Natasha's mother's family history, but it's only an hour - and, if you were the producer, would you have foregone the account of the doctor's lucky escape and later life as a partisan - let alone Benny's beautiful voice?
Gareth