Nicholas kicks things off by pulling back the curtain on what he calls "invisible energy poverty" — the 34 million Europeans who can't afford to heat their homes, except the real number is almost certainly much higher, because most people suffering won't even admit it. He takes you inside a freezing apartment in Besançon, France, where a mum is choosing between turning on the heat and buying groceries — and from there, unpacks how energy poverty isn't one thing, it's nine distinct profiles, each with different causes and different solutions that most policies completely ignore.

The episode ends on a genuinely exciting note: the RENEW-IT project, which asks the completely radical question — what if the people living in these buildings just fixed them themselves? Not with a manual and a pat on the back, but with real training, side-by-side with professionals. And it's working: costs down 15%, people gaining skills, neighbors becoming friends, and — maybe most importantly — the shame of invisible poverty replaced by something that actually looks like pride.