Star Wars: The Clone Wars returns from its winter hiatus to conclude a three-part story arc about the alliance between the Separatist forces and the Zygerrian slavers, who resent the Jedi for forcing them to give up their lucrative trade.
(Devoted readers of The Clone Wars comic will remember that this plot is lifted wholesale from the Slaves of the Republic title in that series. This shouldn't be too surprising, as Henry Gilroy wrote both.)
In this episode, Anakin is in service to the Zygerrian queen, and tries to convince her that she is being used by the Separatists – that she is, in effect, a kind of slave – while Obi-Wan is trapped with enslaved Togrutan colonists on the planet Kadovo.
In this clip from the episode, the Sith Lord Darth Sidious explains his motivation to Count Dooku:
In a bonus clip, watch Anakin and R2-D2 team up to thwart Zygerrian guards.