It’s also available on Britbox
My wife refused to watch. It seems like Seinfeld, a show about nothing but features a groups of fiercely dedicated and secretive clubmembers represented by two stars with metal detectors.
I've met a British-born detectorist, pretty sure he was shady, but knew a lot of stuff about how to zero in on probable Roman / late Roman / early Dark Age sites and then hunt with his arsenal of detectors (like a golfer, different clubs for different things). He told me about the "birdfoot", which is the way the nice straight Roman routes would split at the top of the valleys, particularly later, after the Roman bridges had vanished.
The Romans preferred the shortest routes; the locals would cut right or left and scissor their way down the hill to keep their carts from going runaway, creating a "birdfoot" split in the route, with a switchback on either side. That's one way of identifying a Roman-era route, and once that's identified, Roman sites can often be guessed just by taking a hike or bike down the road..