After learning their field test is suspended because they aren't ready, the Space Cases try to prove themselves by making contact with the Christa, an alien ship outside Star Academy. While Commander Goddard and Miss Davenport look for them on the ship, the Christa is pulled through a spatial rip sending them all on a journey they learn will take over seven years to return home.

After rescuing a teddy bear from Space for Rosie, Radu discovers a plot onboard the ship. But is it true or is he just imagining it?

After playing a practical joke on Commander Goddard and Ms. Davenport, the crew of the Christa find out what their twelve-year-old selves were like when they turn into kids.

After getting into a fight, Catalina's invisible friend Suzee disappears and Catalina inadvertently puts the ship in danger. Will Suzee come back and help save the day or will Catalina find she can do it on her own?

Bova and Miss Davenport hear Thelma talking one night, and find a secret room they never knew about. Bova and Miss Davenport explore it, but Miss Davenport disappears. Thelma then runs away. Can they get Thelma and Miss Davenport back, or will they have one less android and a computer for a teacher?