Help me remember the name of an old TV show?

There was this TV show I used to watch when I was little, in the 90's. There was a man that was really strong, and he had a sword, and he would fight an enemy each episode and chop off their head with the sword. After he chopped off their head, lightning would strike and he would become even more powerful. I think it had something to do with Scotland, and the word Scotland of Scottish may or may not have been in the title. That's all I remember. I know it's not the kinda show a little kid should be watching but never mind that, just tell me the name if it comes to mind.