Walk of Doom: Summary

Zim goes on a trip to the downtown area in order to test a new guidance chip he installed in GIR, but when GIR removes the chip before leaving to store a cupcake, Zim and GIR are left lost and having to resort to public transportation methods to find their way back home. Their journey is complicated futher by Zim temporarliy losing his vision by┬ástaring at the sun, his disguise being mistaken for the one a bank robber has on, and his escape from the authorities being wrecked by GIR replacing his rocket fuel with tuna. Zim then waves over a cab, who drops him and GIR off in Mexico. How Zim and GIR return home is unknown to me, since they appear back at their base in the episode after this one, “Germs”.