The Metal Men are back! And back and back and back again, as we take a deep look into Doc Magnus's lab as he experiments with what it means to be sentient. Meanwhile, a mysterious liquid Nth metal has appeared in the science site at Challengers Mountain that appears to have come through from the Dark Multiverse-and will destroy anything that stands in the way of it trying to stay in our world! As Magnus, Gold, Platinum, Iron, Lead, and Mercury rush to Dr. Jenet Klyburn's aid, one of them will meet their fate at the hands of the Nth Metal Man!
