When Principal Kirkpatrick informs the students that Mr. Fitch has retired, they cheer. But when he explains that Galaxy High will be getting a new teacher to replace him, they respond with typical teenage moans and groans. But their attitudes quickly change when they meet Mr. 6025-A46 -- a fun-at-all-cost alien teacher! With his far-out teaching style (he doesn't believe in homework and gives out gold stars), and his unorthodox curriculum (instructing the students in a variety of cool infiltration and attack techniques), Mr. 6025-A46 soon becomes the most popular teacher on campus, winning the hearts and minds of all the students... with the exception of Brett, that is. Though Josh and Yoko try to convince him otherwise, Brett is certain there's something not quite right about this guy.