When does Invader Zim return?

The series centers on an extraterrestrial named Zim (voiced by Richard Steven Horvitz), from the planet Irk. Zim's mission is to conquer Earth and enslave the human race along with his malfunctioning robot servant GIR. The show originally aired on Nickelodeon from 2001 to 2002, with six of the completed second-season episodes initially going unreleased. A monthly comic book series of the same name was released on July 8, 2015, as a continuation of the television series.