Pulverizer, Donnie and others in “Unfinished Business”

[notices some Kraang tech] Hey, what's this? [picks up the Kraang tech, Donnie snatches it back] That looks like the stuff those guys were stealing.

That's impossible. It's Kraang tech.

[puzzled] What- what's a "Kraang"?

If we told you, we'd have to kill you. [pauses] You see, the Kraang are aliens from another dimension. [Leo elbows him to stop]