Complex sentence: He was seriously wounded in battle with an alien (the alien was a red repaint of Beetleborgs's Ghoulum) however, and his friend Andros kept him cryogenically frozen aboard the Astro Megaship.
Split into simpler sentences: He was seriously wounded in battle with an alien (the alien was a red repaint of Beetleborgs's Ghoulum). However, and his friend Andros kept him cryogenically frozen aboard the Astro Megaship.