This part follows directly after "Part 2". I would suggest against reading this review or watching this before watching the previous parts. After an assassination attempt on Marc's life and surgury with a spinal centipede in an effort to save his life, Marc has mutated into a monster, somewhere between human and the mutants infesting the world. While he still seems to retain some measure of his human memories, he is now ostricized by the people, despite all his previous contributions to the Lighthouse. The political rival, now "winner" in an effort to kill him using popular sentiment, makes a mistake that causes massive destruction tothe Lighthouse once Marc gets enraged.

All the political manuveuring and schemes come to a head in this finale. There's not much more to say. It is a beautifully animated finale, filled with action and emotion. Everything that has been foreshadowed in the previous parts comes to a head, ending this season with a bang.