Monkey Business.When prominent space researchers, travelers and technicians suddenly go missing around the galaxy, Josh, Yoko, Brett and Fluffy are put in charge of the investigation. As the gang visits a space station where the first alien disappeared from, it becomes quickly apparent that there was a struggle and the missing alien tech was abducted. Just then, Josh, Yoko, Brett and Fluffy receive word from Kirkpatrick that Roskoff, who is out on a patrol in space, has sent him a distress signal. The gang jumps into action and heads for her coordinates. When they see their teacher under attack from an alien vessel, they try to intervene. They are unsuccessful, and after a quick action scene, Roskoff and her Defender are taken away. The marshals are, however, able to pick up a clue that leads them to the attacking alien's planet. The team covertly sneaks onto the planet where they discover something quite shocking... the mastermind behind the abductions is none other than a famed monkey cosmonaut named Bobo who went missing during an experimental interplanetary teleportation experiment many years ago. When Bobo arrived at his destination planet (not the destination planet intended by those who sent him -- their coordinates were off), he was exposed to copious amounts of cosmic radiation that mutated him into a partially crazy, mostly diabolical alien super-monkey! His plan? To exact revenge on the team of scientists who were responsible for losing him in space by sending them through the same teleportation device he went through (with the intention of losing them forever). After getting over the fact that Ms. Roskoff was part of such a strange experiment, the gang heroically steps in to battle Bobo and save the kidnapped researchers. In the end, Bobo is brought back to Galaxy High where they are able to reverse the effects of the radiation -- turning him back into the normal monkey he once was. He is then rehabilitated back into the wild. In a b-story, Yoko spearheads a contest to update the design for the school mascot, Blip The Alien. In the end, the GH students vote to change the mascot to Bobo, but Yoko begs them to change it back. Wearing a monkey suit isn’t the update she had in mind!