Doctor before he can enter the crystal, and sends him to the fictional Galactic Prison for the crime of trying to wipe out the Detrians. Dr. Who then picks up Jason, his new companion, and they set off to have neat adventures, beat up green monsters, and arrest the evil Doctor's accomplices. Roz, uncertain of the extent of the newcomers’ powers, hides in the TARDIS corridors and waits for an opportunity to make her move. Jason and Dr. Who try to remove Benny and Chris from the Miracle, but as the TARDIS is unable to materialise within, it is diverted to Detrios. There, Jason agrees to help the hapless Politik Darnak to defeat the green lizard monsters which are about to attack his Citadel. In fact Darnak is just a low-grade civil servant who sees promotion prospects in these helpful aliens, and the lizard people have a rich culture of their own which has suffered under the oppressive rule of the human upper classes. Oblivious to the wider issues, Dr. Who whips up an ACME Lizard Monster Eradicator from spare parts and instantly exterminates ninety percent of the planet's lizard population. Darnak can’t believe that the problem has been solved so easily, but his denial irritates Jason, and moments later the Citadel is attacked by a giant dinosaur. Jason discovers its one weak point and defeats it through a combination of observation, clever thinking and bravery—except of course that he’d created the dinosaur and thus its weakness as well, and in the process of defeating it, a dozen guards have been horribly killed and the Citadel has been destroyed. Jason and Dr. Who depart, leaving Darnak with the unenviable task of explaining the fiasco to the Detrian Superior. The Detrians detect intruders on the Miracle and transmat Chris to their planet for interrogation, where he's horrified to learn that the Doctor nearly tricked him into committing genocide. He is imprisoned with a young rebel, Kat’lanna, who was arrested after the extermination of the lizard people and has given up her hope for a new world order; talking with Chris, however, restores her hope that things can get better, even when he admits that he and his friends were trying to destroy the Miracle. Kat tricks their guard, steals his keys and helps her fellow prisoners to escape, but back at the rebel stronghold they are betrayed and captured by followers