Zarm, a spirit of war and conquest that was once the spirit of Earth tempts the planeteers with power and pits them against each other. Matee's "heart" power breaks him free of Zarm's control, allowing him to eventually save the planeteer's from Zarm's corruption. The planeteers realize that an iron fish ethos will do more harm than good, even if done with good intentions and summon Captain Planet to send Zarm back to his world.
Scar is willing to do anything to have power and control. Scar demonstrates that power and control can turn us selfish and impact others negatively. Meanwhile, Simba's motivation for power is fairness and restoring the good.
Farah and Stella discuss the progress they've made in boosting Stella's powers. Luna states that they don't have time to wait and controls the light around Stella to prove how powerful it is to control what people see.