Maximus secretly builds a weapon that would wipe out all human life, though it would be ineffective against the Inhumans. Only Crystal is aware of this weapon. For the majority of the episode he has the other Inhumans battle the Agents of S.M.A.S.H. He is eventually exposed and defeated, though he reactivates the barrier that shields their city from the rest of the world, but it is destroyed by Black Bolt.
He is behind the mind-control of the Inhuman Royal Family as part of his plot to have the Inhumans declare war on S.H.I.E.L.D. by dropping Attilan onto Manhattan. When Maximus tries to mind-control Spider-Man, Triton uses the Gyro-Cube to delay Maximus so that they can find Black Bolt. Upon being blasted out of the palace by Black Bolt, Spider-Man and Triton are confronted by Maximus and the brainwashed Inhuman Royal Family as Maximus prepares to drop Attilan onto Manhattan. Maximus also states that he plans to hunt all of humanity in order to make Earth an Inhuman world. Triton challenges Maximus to a battle with Spider-Man helping to fight Gorgon. As Maximus tries to mind-control Triton claiming that the humans are evil, Spider-Man knocks off Maximus' crowns freeing the Inhuman Royal Family from his mind-control. As Maximus claims that Attilan will still crush Manhattan, Spider-Man webs up Maximus' mouth to shut him up.