Taking a makeup exam after learning the test results of Sharon's condition, Mutta stands on the verge of achieving the first major step on his journey to the stars: officially becoming an astronaut. But the written test is only a prelude to the most hazardous trials of all. Strapped into the seat of a T38 jet, flying faster than the speed of sound, and learning to fly on instruments only, a single mistake on Mutta's part can mean instant disaster. On the positive side, if he's going Mach 1 when something does go wrong, Mutta probably won't have to worry about it very long. It's time to kick in the afterburners and aim for the stars in the sixth spectacular collection of SPACE BROTHERS!