I love a good mystery series (Poirot, Midsummer, etc...) so, I'm surprised that I missed this little gem: Murdoch Mysteries. Set in Victorian England, the series follows a police detective and integrates the mysteries with all the new science that was being discovered. The first episode explores AC electricity and touches upon the electricity war that was being waged between Edison and Tesla at the time. An interesting concept mixing murder with turn of the century science and the beginnings of forensic science to solve murders.
If you like a good mystery and love getting a little science lesson - this series is for you. So far I'm loving it!