Star Wars: The Clone Wars, Season 2

Ahsoka Tano:
Master, on the ship, Barriss was gone, and she wanted me to kill her. She told me--

Anakin Skywalker:
But you couldn't do it.

Ahsoka Tano:
No. No, I couldn't. But should I have? I mean, it worked out now, but if we had failed, and the ship docked and the worms spread, and. . .

Anakin Skywalker:
Ahsoka, it's your duty to save as many lives as you can. Barriss knew you could save thousands if the worms were destroyed which she thought meant destroying her too. But you did the right thing. You knew the freezing cold would kill the worms. Letting go of our attachments is a difficult struggle for all of us. You followed your instincts. I'm sure she would agree that you made the right choice.