You will Watch Invader Zim Episode 25 online for free episodes with HQ / high quality. Stream cartoons Invader Zim Episode 25 Halloween Spectacular of Spooky Doom Dib is doing experiments with his father’s equipment until it goes wrong. Dib manages to launch a portal into a monster world in his forehead. Dib now starts passing in and out of an alternate dimension where everything is evil. He manages to force Zim to come into the dimension with him. The monsters capture Zim and say they won’t release him if Dib doesn’t “surrender his head.” It is revealed that Dib’s head is the only portal out of the dimension, and all the evil creatures within it want to go through it. Zim saves Dib so that he can get through the portal but he then leaves Dib to the monsters. The monsters have a look through the portal but turn back as they are disgusted by the sight of GIR eating candy.