In Mae and Clinton’s 6th G.A.S. adventure, their mentor from the future, Selectra Volt, can only hint of danger on the International Space Station. To prepare for their mission, the two kids visit space historian Steven Dick, ancient Chinese admiral Zheng He, physicist Isaac Newton, rocket scientis Wernher vo Braun, astronaut Sunita Williams, space sickness scholar Suzanne Jooij, and astronaut and asteroid scholar Ed Lu. When they learn that the malicious Dr. G. is hunting asteroids, they have to come up with a plan to stow away on the space station and try to stop him before he destroys one, or maybe two, worlds.

The Galactic Academy of Science is a secret organization run by teenagers from the future. Its mission is to defend the integrity of science through the ages. Members travel through time to interact with scientists of the past.