Invader ZIM (2001)

S01E07 Dark Harvest

Title: Dark Harvest Plot: After discovering that Zim lacks human organs, Dib devises a plan to use Zim's obsession with head pigeons to persuade the school nurse to investigate Zim's condition. However, when Dib accidentally reveals his scheme to Zim, the Irken invader creates a machine that allows him to swap objects for organs. In a frantic bid to seem more human before his nurse's visit, Zim begins to pilfer the organs of his classmates, leading to a chaotic race against time to maintain his disguise.