Star Wars: The Clone Wars - Season 3 - Eps 12: Nightsisters
Troubled by Asajj Ventress' growing prowess with the dark side of the Force, Darth Sidious commands Count Dooku to eliminate her. But Ventress survives Dooku's assassination attempt, and the jilted former apprentice vows to take revenge, enlisting the aid of her kinswomen -- the mystical Nightsisters -- in her sinister scheme. Mother Talzin, leader of the Nightsisters, veils Asajj and her fellow assassins in a cloak of invisibility, and they infiltrate Dooku's palace on Serenno. Though they fail to kill the Count, their use of captured Jedi lightsabers leads Dooku to mistakenly believe that the Jedi have tried to kill him. Interested in protection, he requests a new apprentice from Mother Talzin.
About Star Wars: The Clone Wars

Title: Star Wars: The Clone Wars
First Air Date: 2008-10-03
Last Air Date: 2020-05-04
Status: Ended
Rating: 8.5/10 (from 2106 votes)
Language: EN
Seasons: 8
Total Episodes: 133
Network: Cartoon Network Netflix Disney+
Genres: Action & Adventure, Sci-Fi & Fantasy, Animation
Production Companies: Lucasfilm Animation, Lucasfilm Ltd.
Synopsis
Yoda, Obi-Wan Kenobi, Anakin Skywalker, Mace Windu and other Jedi Knights lead the Grand Army of the Republic against the droid army of the Separatists.
Cast

Ashley Eckstein
Ahsoka Tano (voice)

Matt Lanter
Anakin Skywalker (voice)

James Arnold Taylor
Obi-Wan Kenobi (voice)

Dee Bradley Baker
Clone Troopers (voice)

Tom Kane
Yoda / Wullf Yularen / Narrator (voice)