"Legacy of Terror" is the seventh episode of the second season of Star Wars: The Clone Wars. It is the twenty-ninth episode of the series overall. It premiered on November 20, 2009. It was written by Eoghan Mahony and directed by Steward Lee.
Official description
After a battle to destroy a new droid factory on Geonosis, Jedi Master Luminara Unduli disappears while tracking Poggle the Lesser. Obi-Wan and Anakin lead a platoon of clone troopers in search of her. Following her trail, our heroes descend deep into the lair of Karina the Great. To their horror, they learn that the hive is alive and teeming with undead defenders. Apparently, Karina can reanimate and control her subjects. Will Obi-Wan and Anakin overcome Karina's undead horde and find Luminara before it's too late?