Kor is a warrior from a species of alien called the Klingons and serves as the main antagonist of the series. He hails from another universe and has come to the Planet of the Apes to aid General Marius in taking over Ape City by giving them updated and more powerful weapons. It's revealed that since the Klingon Empire was under the effects of the Organian Peace Treaty with the Federation, the empire looked for a different means of conquest. So, Kor and his crew crossed over into the Planet of the Apes universe, thanks to a series of drones that opened up a portal. Kor wanted to use Marius as a puppet ruler so the Klingon Empire could conquer and plunder the Ape's universe.
- Kor is a Boom! Studios exclusive character, but like Kirk, he and the rest of the Star Trek licensing rights belong to IDW Publishing.
- He is exclusive to the Star Trek/Planet of the Apes crossover.
- Kor has encountered Captain Kirk and his First Officer Spock in the Star Trek episode "Errand of Mercy". It was hinted that Kor believes Kirk or at least Starfleet itself has followed him to the Planet of the Apes.
- Star Trek/Planet of the Apes: The Primate Directive (comic book)