After the Decepticons broke into the Plasma Energy Chamber, unleashing waves of powerful plasma energy, Chromedome was amongst the group of Autobots flung halfway across the galaxy to Nebulos. After a misunderstanding—namely, the Nebulans threatening to detonate magnetic bombs they had attached to the Autobots after their capture—Chromedome willingly became a Headmaster. He presumably joined the rest of the Autobots in celebration after Scorponok was flung into space and a new Golden Age began on Cybertron. The Rebirth