Those! is one of many unfinished episodes of Invader Zim. No complete scripts exists for this cancelled episode, and very little is known about it, other than that it involves Zim commanding an army of slightly-larger-than-normal ants. 
Details are unknown since neither the script or audio were ever finished and/or released.
"Those!" parodies the 1954 science fiction film Them!, which featured ants grown to giant size, after being exposed to nuclear radiation, attacking the Earth. A final idea was never settled upon.