The Doctor's moral conflict over whether to interfere with the Daleks' genesis, weighing the potential consequences of altering history against the horrors of the known future.

In the claustrophobic, radiation-scarred depths of the Kaled bunker, Davros—his voice dripping with fanatical triumph—unveils the Mark Three travel machine, a grotesque fusion of technology and organic horror. The prototype …

In a moment of visceral revelation, Ronson—his voice trembling with dread—reveals to the Doctor and Harry the grotesque fate of the Kaleds through a viewing panel into the incubation chamber. …