Board Thread:News and Announcements/@comment-6570478-20130331015820/@comment-5075764-20130331160609

No, it's for the episode, "Enemy of my Enemy".

You forget, it's not just the city, or even the country, that the Kraang are planning to poison...it's the entire planet!

It's not really that hard to believe. I mean, think about it. The Kraang intend to poison earth's oxygen, thus making it totally un-inhabitable for humans to live in. Even Karai would realise the seriousness of that. Maybe not Shredder, as he's so fixated on revenge that he's blinded to everything else, but Karai is more level-headed.