Zog was a scout for a Triceration attack fleet, who landed on Earth a few months ago to seek out proof that the Kraang were infesting the planet in order to destroy them in a surprise attack. Unfortunately, Zog lost his state of mind in an adaptation of Return to New York, due to a lack of nitrogen and a prolonged exposure to Earth's oxygen.
After Zog was stranded on Earth, rumors of a 'Dino Man' began to spread quickly through out New York, giving Kurtzman and The Mighty Mutanimals a reason to investigate. But when Dr. Rockwell and Slash found him, Zog attacked, leaving them terrified and bruised.
Raphael took offense to this reckless attack on his friends and headed out to get payback on the Dino Man, and soon encountered him in the sewer (under similar circumstances as in the Mirage Comics). Zog proved to be more than a match for the ninja turtle, but Zog's berserk and naive nature gave Raph an edge and coerced the mindless soldier into believing he was "Commander Zoraph", his superior officer. Zog was successfully fooled and began obeying Raphael's commands.
Zog reported that the Kraang were in New York, which Raph found unusual, given the fact that he and his brothers defeated the Kraang by sealing them in Dimension X. Raph called Leonardo, Donatello and Michelangelo and asked them to meet him somewhere in the sewers. As they came, Raph introduced them to Zog, who's imposing figure shocked the Turtles at first. Zog than lead Raphael and the other Ninja Turtles in an assault on the Kraang, who were indeed still in New York.
After the skirmish, Zog and the Turtles entered a portal that took them to the Statue of Liberty, where the Kraang had made their secret base of operation. The group entered and defeated the Kraang before they could activate another portal to Dimension X, bringing their armies back to Earth, but when Zog went into their storage room and regained his equipment and weapons, he also regained his full senses from a nitrogenic air supply on his old air-supplying gadget. As he sighed in relief of getting his ability to breathe back, he turned on "Commander Zoraph" and shot him down.
Raph and the Turtles followed Zog, where the now sentient Triceraton soldier shows he had no hard feelings towards Raph for lying to him, but rather, he anticipated Earthlings to resort to dishonorable methods. He speaks of how the Triceraton Empire values loyalty and honor, and Raphael had none of those qualities, thus he will activate a Triceraton Beacon, alerting the Triceraton Armada of the Kraang's infestation of Earth, and giving them the signal to begin their attack and destroy Earth. Zog's terrifying plan forces the Turtles to attack, but to no avail. As Zog climbed up to the torch, he is opposed by Raphael, who tries to talk some sense into him because he sees Zog as a friend. Zog did not take Raph's words to heart and attacked. Zog throws the beacon in the air, releasing the signal and location to his Triceraton colleagues. Raphael manages to destroy the beacon, but mere seconds too late. An angry Zog then lunged at Raphael and subsequently fell out of the torch and was clinging onto the edge. Raph begged Zog to give him his hand so he could save him, but Zog looked at Raph and instead said "Long live the Triceraton Empire", then fell to his apparent death.
The Fugitoid used his ship, the Ulixes, to travel six months into the past, long before Zog's apparent death. At this point in time, he and the rest of the Triceratons are searching for the three fragments of the Heart of Darkness.
After the Turtles' long journey to stop the Triceratons from recapturing the Heart of Darkness ends in failure, Lieutenant Zax informs Mozar that Zog has located another Kraang outpost (Earth), with Mozar says they will test the weapon on that planet. This suggests that history is beginning to repeat itself.
When Zog's mind was deprived, he was a confused, violent soldier who's mentality could easily be manipulated. However, in his correct state of mind, he is not an individual who stays bitter, but thinks of the earth as dishonorable and deceiving. Enough to the point where he decided that it should be destroyed in the process of eliminating the Kraang, and signaling the location to the Triceraton armada to do just that.
Like most Triceratons, Zog has a powerful and imposing physique that gives him great strength and lengthy endurance. His head and horns are hard enough to allow him to ram through walls without injuring himself. His skin is hard enough to simply bounce Slash's mace off when it hit his face. Zog's natural senses seem to have enhanced sensitivity, as he was able to quickly locate and identify a hidden Kraang base deep underground simply by feeling the ground with his hand, even in his mentally deprived state. Zog also possesses the following.
Immunity to Telepathy: Zog is apparently immune to telepathic powers, as he was completely unaffected by Dr. Rockwell's psychic powers. Whether this ability is unique to Zog or it is a characteristic of the Triceraton race is to be determined.
Zog's appearance is that of an average Triceraton, but his suit is torn from unknown causes.
- At the 2015 San Diego Comic Con, for the first time several sneak peeks were revealed of TMNT characters, which would subsequently appear in the series, including Zog.