S1, E14: The Animorphs discover a second Kandrona and set out to destroy it, but Jake and Marco are caught with the Yeerk’s new morph-detecting devices and sent into space aboard the Yeerk mother ship. On the ship Jake and Marco uncover some shocking secrets. There is a Yeerk leader more powerful than Visser Three - Visser One. But the biggest secret of all is that Marco’s mom isn’t really dead - worse - she’s Visser One!