Zim allies with the Space Pants, using them to conquer the Earth but intending to destroy them once they've eliminated the humans for him. Once Dib reveals this to the pants' queen, the Ubertrouser, they team up to defeat Zim, with Dib riding in the Ubertrouser like a pilot. The battle legs then explode, injuring Zim, but when Dib and the Ubertrouser argue over the pants' intent to keep conquering Earth anyway, Zim takes the opportunity to send out the signal to kill all the pants.