So far 3 episodes out of 20 have been released. I recently caught the latest installment and i was rather intrigued, so I watched the other 2 episodes. It stars Sabine Mondestin, Steve Lareau, and many others. You can catch the series on youtube and the series will be weekly. With 20 episodes that are about 10-12 minutes in length it doesn't take alot of time to watch and makes a nice new horror series to catch this summer.
Catch the latest episode here: http://www.youtube.com/user/13WitchesWebSerie