The results are drastic: a friendless Tobias joins The Sharing, and is infested by a Yeerk who is later revealed as a spy for Visser One, and is killed. Marco -- now dating Rachel in this world -- runs into his mother, but she escapes before he can confront her. Jake discovers that his brother Tom is involved with dangerous dealings after a Yeerk security leak. And all the while, Cassie has a strong feeling that all is not right. Ax manages to escape from the remains of the Dome Ship, and begins to warn the people of Earth about the Yeerk presence.