Star Wars: The Clone Wars

Massacre (1) (4x19)

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One must let go of the past to hold on to the future. Count Dooku is determined to have revenge against the Nightsisters of Dathomir after their betrayal. General Grievous launches an all-out droid attack against the magic-wielding witches, and Mother Talzin and Asajj Ventress lead the defense with all the dark powers at their command.