The Animorphs try out the disk, but nothing happens. Jake and Marco realize that someone very close to Jake is a Controller. The Controller turns out to be Jake's brother, Tom. Jake wants his brother back, and he'll do anything to do it. They tried morphing out into ferocious animals from the clinic that Cassie's mother works in. Jake acquires a tiger and Rachel acquires a lion. They use it to try and free all of the humans in the Yeerk Pool located under the school. Their attempt ended with no free humans, without Tom, Tobias was gone (probably captured by the Yeerks), and the disk was lost. Written by
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Jake, I'm really sorry about your brother.
I'm gonna set him free no matter what it takes. When we do, I'm gonna take that Yeerk inside of his head and squash it like a bug.
At least now we know that the Yeerks need some sort of booster treatment every three days.
And we know a way into this pool, whatever that is.
Yeah, you'd think that Elfangor would've given us an instruction manual or something.
You mean before or after he went toe-to-toe with Visser Three?