Hawkman wakens to find himself in a rocketship and getting ready to crash-land on Saturn. Exiting the ship before then, he sees a man being menaced by a vulture and saves his life. Hearing that the population is being menaced by a tyrant named Hora, Hawkman agrees to lend his services to the populace. He defeats them, is rewarded with a leaden box of radium, and rockets back to Earth.; Sandman finds himself heading toward Uranus, a planet so cold that the population's brains are housed in bodies of crystal! When Sandman lands on the planet, the lack of oxygen nearly kills him until a citizen rescues him with an oxygo-tank. In gratitude, Sandman agrees to help the King of the planet battle his nemesis, Kafta, the evil one, and defeats him. The King presents Sandman with a crystal that cures brain cancer and books that explain its use, which come in handy for reading on the long trip back to Earth.; Dr. Mid-Nite lands on Neptune, and spots some sort of a man-built communications system. He is met by several creatures and taken to meet Hydara, ruler of the subterranean people and made a slave. Just then, a person runs in and states that he has caught the dreaded plague that has been killing off his people. Dr. Mid-Nite deduces that they merely have the measles, which he can easily cure. He asks for herbs and makes a solution that the people can absorb through their feet-roots. As a reward, he is given a complete set of books describing their secrets of plant growth and surgical work.; Starman is rescused by metal men of Jupiter, show him what had happened to the JSA back on Earth, then tell him that they are doomed because some mysterious force is eating the planet. Starman builds a giant gravity rod and uses it to fling the dangerous foreign matter into space. Thanksful to him, Starman is given books that tell how to treat metal so it can be woven into cloth, or made transparent as glass or entirely invisible! Starman then uses the force of the giant gravity rod to propel his ship back to Earth.; Atom finds himself crash-landing on the planet Mars, and, strangely enough, he finds it to be like a garden paradise! He also discovers, because of the low gravity, he can jump and fly like Superman. He comes upon two groups battling and decides to fight for the weaker guys. As a reward, the inhabitants show him the canals of Mars, which actually have water in them, and is given an Educatograph, which conducts thought knowledge into the brain. The Atom then wages war on Butor, a renegade that threatens to poison the water supply of the planet before heading back to Earth.; Spectre heads towards Pluto and exits his ship before it crashes. Unaffected by the cold and ice, he begins to fully expore the planet when he finds a man-made cover for a shaft going into the ground. shrinking, he enters the shaft, reaching a city below, and encountering a resident who believes him to be evil. He explains to the Spectre that they are menaced by the "furred ones" who inhabit in the city's square buildings. Spectre finally makes peace between the two groups. Rewarded by Pluto's scientists with the secret of making heat used for travel in cold areas, Spectre heads back to Earth.; Johnny is headed directly at the planet Mercury and only the Thunderbolt keeps Johnny from roasting alive inside. Once on the planet, Johnny encounters a giant bug-like spider, is knocked silly and taken prisoner and put into a cage. Thunderbolt saves him again, this time from a giant ant-eater, and saves the giant bug-like spiders from it as well. Johnny is rewarded with an Occelerator, a device that can be used to get information out of people.; The goddess Aphrodite directs the rocket bearing the unconscious Wonder Woman to the planet Venus, and the Amazon is brought before Queen Desira, who immediately recognizes her as the Oracle of Aphrodite. Wonder Woman is asked to help battle giant men-warriors, who are killing and capturing the men of the planet. In a series of desperate adventures, Wonder Woman defeats the warriors and is given the gift of magnetic hearing by the Queen.; Speaking to some of his officers, Adolf Hitler demands that something be done about the Justice Battalion, and a Nazi engineer says he has a way to accomplish that task: by rocketing the members into space and to other planets in the solar syatem by the use of special rocketships he has designed for interplanetary travel. Meanwhile the JSA is meeting in their HQ when they are suddenly overcome by gas pumped into the room by Nazi agents, placed into the rockets and shot into space.; After returning from their galactic adventures, the Justice Battalion members are informed as to the whereabouts of the German spies who were responsible for rocketing them into space, and they make short work of them. Wonder Woman, now an Honorary Member of the JSA, is assigned permanent duties as Secretary for the group.