Chris and K9 find themselves in a spaceship corridor and manage to restore the Doctor's oxygen, enabling him to continue manipulating the ship by pretending to be dead. They realize Romana is missing and the TARDIS is gone, taken by Skagra, who needs Time Lord technology to find hidden knowledge. Skagra intimidates Romana with his Krarg army and discusses his plan involving Salyavin and the book's code, which he deciphers by manipulating time. Clare accidentally activates Chronotis’s old TARDIS, causing him to reappear and explain their urgent need to stop Skagra from accessing Shada, the Time Lords' prison planet. Meanwhile, the Doctor and Chris travel to the Think Tank, encountering scientists whose minds were drained by Skagra, learning he seeks Salyavin's unique mind for his plans. As they face a Krarg attack, the urgency to thwart Skagra's scheme intensifies.