Synopsis

Just as they were preparing to depart, leading their captives—slaves seized by the Granite Gun—Crusher and Gravel found themselves facing an army. Employing the Granite Gun, the stoneheads swiftly vanquished the soldiers and set course for Planet Granite. There, they presented the slaves to Captain Marblehead, who commanded that they be released from their stony prisons. He explained their purpose: to excavate the rock which would sustain the Marbleheads, and ordered them dispatched to the mines