Part 4 : Dead-Boy

On a stormy night while the team is away, Blade fights against a new, 
and more powerful, black Tekkaman.  Most of the team return to base 
(except for David), and discover D-Boy battered and bloodied.

That same evening, while slightly drunk, David recalls seeing Aki 
transform back to human form with D-Boy right behind her.  Later, 
while passing through the cemetery, he comes across a strange, 
androgynous man playing a harmonica, and they begin to talk.

The whole team believes the attack was Radam’s doing, and they 
secretly launch the Blue Earth to find the person responsible for 
injuring D-Boy.

Right after launch, they see a red aura streaking across the sky; the 
reaction of their Tekka-crystals tells them that this is the person 
responsible for the attack, so they chase the unknown Tekkaman all 
the way to the Orbital Ring.  Transforming into Tekkaman form, they 
attack the Black Tekkaman, but he is too quick and powerful.  Even a 
direct hit from Yumi’s Reactor Voltekka can’t destroy him.

The team is about to be destroyed when D-Boy and Aki show up to fight 
the Tekkaman.  Everybody is surprised to hear it speak because they 
thought it was an alien Tekkaman.  Yumi reveals what she has felt 
during the battle and says, "It’s not a Radam, he’s just us - a 
human!"

The Black Tekkaman uses its Voltekka and has Blade at his mercy, but 
David attacks, and the Black Tekkaman retreats for no reason, leaving 
a near-dead D-Boy.  The Black Tekkaman returns to the cemetery, and 
changes to human form.  We discover that it is the same person David 
met that night in the cemetery.