rec: A Place to Stand
I think almost everyone has already read this, because it is fantastic, but just in case you missed it, take a moment and go read.
This story manages to be both a great episode-type story, as well as reveal insights into Methos and Duncan's characters and their feelings about each other. It's a beautiful read, set in a location one doesn't usually see in HL stories, and it is fulfilling and a bit achy.