Along with the new preview write-up and video, you can get yourself geared up for the Nightsister TCW story arc conclusion, "Witches of the Mist" (S3 Ep. 14), through the preview version of SW.com's episode guide.
And as for this week's episode synopsis...
"Anakin and Obi-Wan, sent to track down the mysterious figure behind the deaths of several Jedi, soon find themselves on the trail of the monstrous apprentice that Ventress has created: Savage Opress. However, Dooku and Ventress also discover that this new apprentice has a will of his own..."
We'll be sure to update when the guide gets expanded following Friday's airing.
UPDATE: The "Witches of the Mist" (S3 Ep. 14) episode guide has been expanded with video commentary following the conclusion of the Nightsisters story arc...for now.