An accident on board the Polaris cuts Astro adrift from the ship, and he floats in a panic, through the blackness of space. Tom and T.J. must rescue him and calm his fears. Psychological damage from the experience is more devastating than the physical harm, and Astro learns that he may "never see space again". T.J. Thistle has his own ideas of providing Astro an instant cure. But a meteor striking the Polaris provides a better method for bringing Astro around.