S1·E16 Planet Jackers

Zim is upset because all of the other Invaders are doing much better in their tasks than he is, though he inadvertently discovers that his signal to the data hub has been interrupted. When Zim takes a closer look, he discovers that the Earth has actually been hijacked by the Planet-Jackers, an alien race who must throw other planets into their dying sun in order to survive. Zim begins to formulate a plan to stop the Planet-Jackers, but when Dib refuses to believe him, he realizes that he must save the world he plans to destroy by himself, just for the sake of being the one who gets to destroy it.