"Invention Intervention" is the twenty-third episode of the second season of The Penguins of Madagascar.
Kowalski, banned by Skipper to stop inventing, makes an invisible ray. However, this invention backfires and begins turning everything in sight invisible.
- This is the second time that King Julien appears without Mort or Maurice (though he did mention his name)
- This episode reveals Private has a sleeping mask. However, he hides it before Kowalski is able to see it.