The infestation continues as Visser Three tries to figure out which one is the real Tom. Rachel, still inside Tobias as a Yeerk is getting very mad because she does not want to stay in the Yeerk morph any longer. Meanwhile, Cassie and Ax are rapidly approaching the infestation pier. Ax only has minutes left before he has to demorph, and he's next in line for the new Yeerk. Cassie is helpless as a human, but she can't morph in front of the Controllers. Marco is the only one who can do anything to help all the other Animorphs, he finds out that Jake has morphed Tom, and he destroys all the special Yeerks, Jake (in Tom morph) reacts to the screams of the Yeerks and run in to check on them, while Visser Three and his Human Controllers take away the real Tom. Everyone hears the alarms, Cassie and Ax escapes while Ax morphs back to an Andalite in a hidden place. Marco morphs a cockroach and dodges boulders crashing to the ground, to get out, as Jake as Tom is also trying to get out. As

After Jake and Marco witnessed a kid their own age perform a feat of super-human strength, they are stunned. The kid just ran in front of a car to save a dog, and he did not even get a scratch, and the car was destroyed. Ax, has become a television-obsessed alien who can not stop watching television and imitating everything that is produced from the stations. They are even more surprised when the kid follows them back to Cassie's barn and reveals his secret after Jake and Marco morphed dogs to find out that he had no human scent, he is part of an android race called the Chee, which was created by the Pemalites for non-violent creatures. Now the android, Erek, needs their help. The Yeerks have stolen the Chee hologram crystal and plan to use it to hide Yeerk pools from human eyes; so all the humans can only see a hologram. Erek can't touch the crystal himself; it would destroy his hologram, that is why he needs help from the Animorphs. Jake, Rachel, and Erek try to find the crysta

Tired of defending the world from alien invaders, the Animorphs decide to unwind and relax at their school's spring dance. Rachel can't wait to go with her dream date--Tobias, of course. Once she persuades Jake and Cassie to double date with them, she drags Cassie off to the mall in search of the perfect dress. The shopping expedition ends in disaster when Cassie discovers that a well-known cosmetics company tests their products on animals. Enraged, she convinces Jake to break into the laboratory with her and free the animals. When their plan backfires completely, the other Animorphs rush in and save the day. Exhausted from the battle, Marco as a dog; runs into the woods so that he can morph in private. Unfortunately, he doesn't realize that he's got company; a boy was taping him morphing back into a human....

Nothing is going right for the Animorphs. Tobias refuses to take Rachel to the dance, Marco can't find a date at all, and Ax is acting even stranger than usual. To make matters worse, Harold Nesbit, notorious computer nerd, has a video tape of Marco morphing from dog to human, and he was about to mail it to ""The World's Weirdest Video"" show for a big money reward. The night before Harold was going to send the video, Marco and Jake trespassed on his property and try to steal the tape, but they were unsuccessful, they accidentally stole the wrong tape. The next day, the group found out that Harold has not sent in the video, yet and they search the mall to find him, but he had already sent it before going to the mall. Jake and Rachel decide to sneak into the TV studio and steal the tape. Unfortunately, this is not as easy as it sounds. When Rachel and Jake arrive at the studio, they discover that a new TV executive has taken control of the studio...and his name is Visser Three, whil

The spring dance is only hours away, and Tobias still refuses to go...he's got more serious things to deal with. A graffiti image of a hawk is popping up all over the city. Worried that someone knows about his hawk morph, he decides to investigate the situation. Meanwhile, Marco is busy conducting his own investigation. When he notices a suspicious looking construction worker hanging around school, Marco follows him...and discovers that his friends are in huge danger.

Ax lands a job at a new electronics store. The store owner pushes Ax to sell, sell, sell for their huge cell-phone promotion. When Tom buys two--one for himself and another for his latest crush, Melissa Chapman, Jake and Marco get a little suspicious. What's with this sudden cell-phone craze? They follow Tom to investigate the situation...and are horrified to discover what Ax is really selling.