6. Freedom 6

With the fate of mankind riding on his shoulders, Takeru vows to return to Eden. And after revealing her childhood memories of a space flight gone horribly - and fatally - wrong, Ao demands to go with him. But can their makeshift rocket, scrapped together from an antiquated Apollo program, make the journey? As the series speeds towards its dramatic climax, it's a voyage sure to end in destiny - or disaster.