The original series is airing Saturdays on ThisTV
We recently started getting a new broadcast station in my area as a sub-station of the local CW network called ThisTV, and on Saturday mornings it runs one episode of Busytown Mysteries, and then 2 episodes of this classic show.
I don't think any cable/satellite networks are carrying it yet, but you can pick it up over the air in these markets:
en.wikipedia.org/wiki/List_of_This_TV_affiliates
Enjoy!