Splinter and Leo in “Unfinished Business”

You should be enjoying your victory. You did a great thing today, Leonardo. You saved everyone.

Not everyone. I tried to get Karai out of Shredder's control. I failed, sensei.

We saved her once, Leonardo. Perhaps we can save her again. And now you show great gifts as a healer. Being at the edge of your life, led you to unleash a power that few martial artists can tap. I am proud of you, my son.