As Captain Cole is being recognized as guest of honor at the Third Centenary of the Solar Police Force, suddenly a death ray strikes and kills a number of dancers, then seeks him out. Cole investigates the ray and discovers that his enemy, Felon, is behind it, so Cole follows his foe to Earth, offering his services to aggressor nations.; On their way back to Earth, Flint and Mimi are attacked by a space monster as they pass the planet Jupiter, and when others threaten,the crew decides to land on Jupiter. There they face a threat of The Great Eye, The Great Ear and The Great Mouth.; Spurt is sent by his superior ot Mercury to battle the dreaded beaked men who wear detachable bat wings and have been attacking the commerce routes and taking hostages for ransom.; The people inhabiting Auro's planet gather to watch a strange space ship hurtling from space and landing into a lake. When Auro investigates, he discovers the ship contains a young Prince of Saturn who was shot into space by his madman uncle.; Dr. Curan brings desperate news from the Earth to Lt. Crandall that the Moon is going to explode due to the build-up of hydrogen gas at its core. Unfortunately for them, one of the passengers invited along for the trip, Dr. Zynnon, has an intense hatred for mankind and seeks to destroy them.; While cruising in outer space, he Comet spots an Earth ship heading directly toward Vegeto: The Planet of Deadly Planets, and he decides to follow them down and save them before the planet's vegetation destroys them.; Giant must face fierce men from the North Pole who travel in strange land sleds that can reach speeds of 100mph and are armed with ray guns, who suddenly attack North America.; Kenny's term of enlistment in the service has ended and he intends to return to Earth, even though the Colonel and Dwight scheme to get him to re-enlist. Unbeknownst to them, their plot turns out to be for real and Carr re-ups to help repel the invaders.; Awaiting the return of a scouting party, North receives an urgent SOS from the group, stating that they were captured by pirates from Pluto. North asks the commandant for help and Gale Allen and her Women's Space Battalion arrive to help out, much to his disdain.