Intergalactic Exchange.Mr. Spzoercliipw’ has some exciting news for the students of his Alien Cultures class: he has arranged for three teams to visit three different alien schools on three different planets, each unique and interesting! Bobby, Toby and Kimball will go to sunny and tropical Lushtopia; Spavid, Andi and Ryan will visit the bustling Hiptropolous; and Josh, Brett and Yoko will be attending Outpost High on Dustbowl 11. At the end of their weeklong visits, the teams will return to Galaxy High and give reports on their experiences. Though Josh, Brett and Yoko aren’t too excited to be going to the least appealing of the three places, there’s no room to wiggle out of the assignment – because Principal Kirkpatrick is looking forward to a week without his mischievous son around! When the gang arrives on Dustbowl 11, they are greeted by a group of cheery aliens and treated as guests of honor. Suddenly, the team doesn’t think their visit will be so bad after all. As the week progresses, though, strange things begin to happen. Yoko is suddenly missing a chunk of her hair, Josh notices that his toenails have been mysteriously clipped and Brett loses a tooth! Suspecting that something weird is going on, the gang snoops around the school and ultimately discovers that, in a secret lab, the aliens are using their DNA samples to create Josh, Brett and Yoko replicants! Before the gang can stop them, however, they’re discovered and apprehended, allowing the aliens to implement their plan: to use the replicants to gain entry into Galaxy High so they can take it over! Can Josh, Brett and Yoko escape the planet and round up the other Galaxy High students on neighboring planets before their own school is attacked? In a b-story, Principal Kirkpatrick is elated that he finally has a week where he doesn’t have to worry about constantly disciplining Josh.