Crisis
The Decepticons continue to move the Hydra cannon into range of the Autobot base on Earth, and Optimus Prime and Jetfire mobilise to stop them. Before departing, Prime attempts to give Hot Shot the Matrix of Leadership, but Hot Shot does not feel he is worthy. As the Hydra cannon powers up, Optimus and Jetfire attack the Decepticon ship in their combined form, and disengage as the individual Decepticons strike back. The battle lasts long enough for the cannon to be recharged, and Thrust hits the firing control - but Optimus leaps in front of the blast, and uses the power of the Matrix to nullify it. In the process, however, he sacrifices his own life, and as the Decepticons retreat into space, his body disintegrates into space dust, leaving only the Sparkplug and the Matrix.
Aired 26/09/2003EP 39 - Crisis
Transformers: Armada
On the mechanical planet of Cybertron live super robotic organisms known as Transformers. There, mainly consisting of convoys, the Cybertron army, and their old enemy Destron fell into conflict to gain hold of a new power to join their side. A new breed of Transformers known as the Microns. But, grieving over the battle the Microns set off to the other end of the universe. 4 million years later, on Earth, 3 young children activated a mysterious panel inside a cave. And somehow, that was the dormant Micron...