The Justice League of the 1960s stars in "Critical Mass!" When an evil madman cracks the secret of size-control technology, the League--The Flash, Green Lantern, Hawkman, Aquaman, The Atom and Zatanna--has met its match, especially when the madman uses his brand-new weapon directly on them! Grown to gargantuan size and out of control, the World's Greatest Super-Heroes become the World's Most Dangerous Threat!