Cassie begins to discuss the morality of enslaving another creature, while Aftran defends the Yeerk's right to experience life as a human or an Andalite does. Cassie tries to turn Aftran against her own people. Aftran tells Cassie that to preserve the freedom of one species, she must surrender her own. Aftran presents Cassie with the following scenario: if she were Aftran, would she stay in the Yeerk Pool forever? Cassie is uncertain. She allows Aftran to enter her brain, thus freeing Karen - and putting the life of the planet at stake. Cassie convinces Aftran that what the Yeerks are doing is wrong. In return, however, Aftran compels Cassie to morph to a caterpillar, and to live life as a helpless worm like she is essentially asking Aftran to do. Cassie reluctantly agrees, and morphs, staying beyond the two-hour limit.