Stardust Memory - S1.E21

On the way to Terra the Mu encounter a large human army near Jupiter. War and bloodshed ensues with lives lost on both sides. The human army is equipped with special spacecrafts immune to the Mu's psionic powers and as a result three of the blue-type Mu are killed. Tony who was struck with grief unleashes a large psionic wave that pulverizes a large section of the human army. Keith then decides to use the Mu captured on Artemisia as hostages and this angers Tony even further.