The Mortis story arc of The Clone Wars continues this Friday and the main site has posted the preview version of the episode guide of "Altar of Mortis" (S3 Ep. 16) with the following synopsis:

"Before the Jedi can leave Mortis, the Son takes Ahsoka captive in an attempt to entice Anakin into joining him to use their combined strength to overpower his Father and Sister. Meanwhile, the Father attempts to stave off a disastrous showdown between his children and maintain the Force's increasingly precarious balance on the planet."