If you saw the first episode of my election adventure you'll have gathered that I like to begin each of my journeys with a bit of history.
And given that I've been travelling around Wales, it was inevitable that I'd end up in a castle at some point.
I had plenty to choose from but I chose Harlech Castle because for five years at the start of the 15th Century, it was the military and political headquarters of Owain Glyndwr.
A potent figurehead of Welsh nationalism, he led a full-scale revolt against the ruling English crown and remains celebrated six hundred years later.
In the programme, local historian Benjie Williams told me more about the revolt and the sense of Welshness fuelling it.
Fascinating stuff, but as in the rest of my journeys, I'm visiting the past to find more about the present.
So, looking at Glyndwr's revolt is a starting point to discuss the modern day version of political control in Wales: devolution.
Today, decision-making over twenty areas including health, education, transport and the environment is in the hands of the National Assembly, with day-to-day power exercised by the Welsh Government.
The UK Government in London is still responsible for the big stuff like benefits, defence and policing.
All political parties in this election are promising to increase the powers on offer to the National Assembly here in Wales in the wake of Scotland's Independence referendum.
But on my travels I found that there's still a lot of confusion about who's responsible for what. Something that one expert I spoke to put succinctly:
As he says, the division between governments is most confusing when it comes to the health service. It's fully devolved so entirely the responsibility of the Welsh Government, which has faced considerable criticism for its record of running it.
But surveys show that many people still pin the blame or give the credit for the NHS in Wales to the UK Government in London, which has no say.
What's certainly true is that the amount of money the Welsh Government gets, and so indirectly the amount spent on the NHS, is decided by ministers in London.
That, and the fact that politicians in all parties are determined to make the NHS an election issue regardless of devolution, means that it's something I wanted to look at in this series.
So I've been speaking to those involved on both sides of the argument about controversial changes planned for the Welsh health service to try to sift fact from fiction.