When Pluto becomes too cold to support life, something must be done quickly if the inhabitants are to survive. Space Patrol is given the task of solving the problem.
While Larry Dart and his crew are visiting the asteroid Pallas, Husky cuts his finger on a meteorite fragment. Upon returning to Earth the unfortunate Martian contracts an unheard of disease and begins to shrink.
Three space ships have disappeared mysteriously and Dart is instructed to investigate the matter. He and his crew soon find themselves in the grip of strange forces.
Dart and his crew, seeking a lost party of scientists on Jupiter, come upon a band of criminals who are killing numbers of Lumis, the only wild animals on the planet.
An asteroid has been deflected from its orbit and is heading straight for the capital of Mars. Colonel Raeburn, Head of SPACE PATROL, gives Larry Dart an almost impossible assignment - to destroy the asteroid.
In the depths of the Atlantic are underwater farms, manned by robot workers which obey the commands of men at all times - at least they do until a disaster occurs.
In the year 2100 the weather is strictly controlled, so there is dismay at Space Headquarters when the sun is blotted out by a cloud which should not be there. It can only have been put there with evil intent.
Slim is sent to Venus to investigate a mysterious disease which is paralysing the population. He finds a serious and highly dangerous state of affairs on the planet.
Earth is in danger of burning up from a tremendous heatwave caused by an enormous explosion on the sun's surface. What can the Space Patrol do to rectify the situation?
Political terrorists on Phobos threatening to unleash nerve gas on the Martian capital capture Capt. Dart, Huskey and Slim as a hostages, then slowly begin burying them alive in sand.
