The latest season of McLevy came out last month. I missed some of it, but it looks like BBC Radio 4 is currently rerunning their McLevy catalog. I don't know if they will be running all 8 seasons, but they are right now on season 1.
Click here to do a search for the latest episodes.
Don't know about McLevy? Check out the Pulp Reader's McLevy subsite to learn about Edinburgh's 19th Century beat detective.