Is there any way for us who are in the US to watch the series?
My wife and I, tipped off by the OP, made a point of watching it twice, even though we used to tour up there (by car, and I've been around twice in a sailing yacht, a somewhat tougher experience) whenever we had foreign guests. Well worth the time.
For a Stateside resident to see it, unless you can find those two programs loaded up to YouTube, I think it likely you'll have to commit copyright theft and find a torrent to download. I wouldn't worry overly much about the rights of it: the BBC in Northern Ireland paid for it with British taxpayer money, and no doubt there was some of Anto's and my tax money in there too. (Technically, the British and Irish pay a compulsory license fee each to their local State broadcaster, but it is a tax by another name.)
If you're quick you may still catch it on various repealers, the BBC's being called iPlayer (honest). It won't let you in unless you have a British address, but that's easy to arrange. I use an old Cambridge address when something is on the BBC repeater but not on Freeview (I think that's what they call the satellite service that gives us the BBC, which are about the only channels we watch, here in Ireland (1)) but
from the States you just get a free virtual private network (VPN) that lets you choose your server by country. Unfortunately Opera, a browser with a really good free VPN, doesn't let you choose the UK as a virtual "home country".
(1) When we first got satellite TV, I spent literally days just getting my head around the nomenclature so that at least I could tell the electronics suppliers and installers what I wanted. For my efforts we jumped from 3 useless channels to 300 useless channels.