Star Wars: The Clone Wars - Season 4 Episode 22 -

"Revenge" Fueled by hatred, Darth Maul and his brother Savage Opress set out to take revenge on the Jedi who had sliced him in half on Naboo over ten years earlier. Maul sends a message to Obi-Wan Kenobi to confront him alone, by murdering the inhabitants of a village on a distant planet. Upon arrival, Kenobi is double-teamed by Maul and Opress and they leave the planet with Kenobi as their prisoner. Obi-Wan receives aid from an unlikely ally, Asajj Ventress, now a bounty hunter after the one million credit bounty on Opress. Outmatched, Obi-Wan and Ventress flee Maul and Savage in the ship's cockpit, leaving the two Dathomirian brothers to patiently stage their next move - with Maul vowing to exact his revenge on Obi-Wan.