Really! It's not! An epic space battle between Zim and Dib leaves them both (plus GIR and Gaz) stranded on a strangely Earth-like alien planet on the other side of a wormhole. Now Invader and Defender of Earth must work together with the strange natives to get back to their precious Earth, or will they be too busy being at each other's throats? Or will that just be Gaz at Dib's throat? At least this wormhole didn't have a walnut-eating moose... or does it?