The crew meets Catalina's friend, Suzee, and crash land on a strange, uncharted planet.

While out exploring, Rosie and Harlan find a strange creature. Harlan tells Rosie to put it back, but then the Spung attack and Rosie takes it with her. Harlan tells everyone what happened as Rosie tries to hide the creature, but Suzee finds out. The girls discover it's a Rhombi, and that you can get telekinetic powers by drinking it's spit, and that it's primary hunter is the Spung.

The kids find a phone device and uses it to call home. The kids talk to their parents and Suzee talks to Catalina. Miss Davenport gets fired, and Commander Goddard is informed that he's in trouble. However, a Space Pirate named Reaver, who is the reason Commander Goddard is in any of this mess in the first place, lands on the planet and wants to steal things from the Christa. He even wants to sell Radu into slavery! Harlan is the only one who got away from Ubi, and even though Suzee helps (sort of), it's Harlan Band who saves the day!

The Hil people mistake Harlan for their king and want him to defeat a centuries old monster. So he, Thelma, Rosie, Radu, and Suzee go to defeat the monster. Meanwhile, Miss Davenport and Bova are trapped inside a huge fruit. The monster turns out to be a little boy (over the age of 200) who is scared of the Hil people, and is the last of his kind. Harlan makes everybody happy, and the Hil people give them more food.

Rosie becomes a tattletale during a game of Truth or Doom and Suzee swears that she'll never speak to her again. Then the kids sneak out and a sulfur storm comes, but Rosie is undecided about telling everyone; she doesn't want to look like a snitch. Will Rosie tell to save her friends, or stay quiet and no longer be a tattletale?

Radu has a dream where Elmira warns them that they are in danger. However, nobody believes him. There's a message that says that the Christa crew can prepare to go home, but Radu says that it's fake and that they are all in trouble. Suzee finally reads his mind and discovers that they really are in trouble.

While crew is collecting things from space they see an asteroid coming toward them. At first they're scared but they calm down when they realize it's a practical joke. They have accidentally brought onboard a cute little pet thing through the vacuum. The pranksters tell them it is a monster but the crew doesn't believe them. The pet has a big appetite and wants to eat everything onboard. It grows into a monster but the crew is able to flush it into space before it eats them.

Miss Davenport sure has gotten a big head lately! She overloaded her brain and heard the crew talking about how they would like to be each other, and so she grants their wish. Problem is, when they want to switch back, Miss Davenport says she can't do that. Can the crew get what they want, and will Miss Davenport's head ever return to its normal size?

The Christa heads into a sector of space controlled by Ma, an energy-sucking monster. Ma steals the energy of everyone besides Radu and Thelma, and Ma is draining Thelma's energy! Can Radu save the day?

Radu and Bova get to go on a ""boring"" mission with the Starling 9 because Harlan and Suzee didn't want to go. Things go smoothly, until Suzee acts too smart and Harlan acts like a hotshot, and as a result, the Christa becomes a runaway! But what's worse is Harlan clipped the Starling, and Radu and Bova are running out of oxygen! Can the crew work together and stop the Christa before it runs out of fuel and save their friends before they die?

The Christa runs into an enemy the crew could have never imagined--themselves! Can the crew defeat their evil selves, or will evil actually prevail?

The Christa makes an encounter with a space station with a mind of it's own named Pezu after it was attacked by Spung. But the problem is that Pezu wants Suzee for herself, and is putting the Christa in danger to get her. Can the crew escape Pezu before the Christa is destroyed?