As bizarre as the last arc was, Imagawa shows no sign whatsoever of slowing down his train. If you thought machine-brain memory time travel was nuts, get ready for some really loopy shit getting set up this week.
Remember the end of last episode, where we were about to see the death of Juuzou Kabuto? Well, that's too bad, because while Kouji got to see it, you didn't. Kouji only says that he "saw a lot of things in that Corinthian pillar", and he doesn't sound like he enjoys recalling them. Other than this, things at Kurogane are (kind of) back to normal, in that they're serving customers-- Boss and friends have taken over for the Kurogane Five, all of whom are definitely dead save Kiku-- and at war with ol' Dr. Hell again. Ashura's been taken in for the time being, because Ashura needs a place to hide from Dr. Hell, and because the Kurogane guys really need help: something has come up.
Ashura has to diagonose a bedridden and madness-prone Tsubasa, and as it turns out, Viscount Pygman is laying down an indirect assault. Since, owing to the events of the last few episodes, Dr. Hell can't attack directly, Pygman has instead opted to haunt Tsubasa with the ghost of a certain person. Though it doesn't speak, the spirit is somewhat vengeful, and Tsubasa certainly seems to bear some kind of crippling guilt that's amplified by the haunting and slowly killing her. So who is it? Get this: it's the ghost of Tetsuya Tsurugi.
If you're familiar with Mazinger lore at all, you'll recognize Tetsuya as the pilot of Great Mazinger, Mazinger Z's eventual replacement. You won't recognize him in any other way, though. Those eyebrows aren't half as thick as they used to be! In this story, Tetsuya has become the pilot before Kouji, having used a prototype built by Kenzo Kabuto and having died under unexplained circumstances. Being a ghost, Tsurugi just sits around quietly, being a drain on Tsubasa's dirty conscience. This brings up a lot of points. Is the "Blade" character who appeared in the first episode a different entity? Was the momentary appearance of Great Mazinger a total red herring? Who knows, man? This show is crazy.
It isn't long after all this is explained and set up that the aforementioned prototype is blasted into the earth like a falling comet, and it approaches Kurogane, piloted by Kenzo Kabuto (wait, what?). Its name? Tesshou Genda is here, as ever, to give it an extra-powerful "I am so hype that I am completely losing my mind" yell. The name of the robot is Energer Z. I can't even count the amount of times I've rewound the episode to this scene. Genda, you are the best. At this rate it looks like we have room for this arc, and then the final battle with Ankoku Daishogun. The best possible outcome would be Bandai allowing Imagawa to make an Ankoku Daishogun movie, but that's too awesome to ever happen.