When Khepra threatens to split up Cleo, Akila and Brian, the trio must demonstrate that they make a great team.
Frustrated with life in the future, Cleo tries out Brian's untested time machine to return to ancient Egypt; in the process, she's caught in an ever-shrinking time loop that could destroy the entire universe.
Cleo is determined to prove Callie is the spy once and for all; meanwhile, Akila hires her favorite band for the academy's annual "No Science Fair."
Khensu tasks Cleo with mentoring a younger student named Philo, who turns out to be just as cocky and brash as she is; getting a taste of her own medicine, Cleo's respect for Khensu grows.
Posing as Pharaoh Yosira, Cleo tries to convince galactic leaders to join the fight against Octavian; at the same time, Cleo tries to uncover who is planning to kill Yosira.
While Cleo and the gang try to find Octavian's spy, a robot impersonates various people from the academy.
Cleo and her crew go on a rescue mission to crime-ridden Hykosis City, which leads to a devastating confrontation with Octavian.