Together with Sarah and Harry, the Doctor finds himself stranded on thewar-torn planet Skaro where the conflict between the Thals and the Kaleds hasbeen raging for a thousand years. Chemical and biological weapons have started acycle of mutation among the planet's inhabitants that cannot be stopped. ButKaled scientist Davros has perfected a life support system and travel machinefor the creature he knows his race will ultimately evolve into — theDalek. The Doctor's mission is to stop the creation of the Daleks! This novel isbased on a Doctor Who story which was originally broadcast from 8 March-12 April1975. This title features the fourth Doctor as played by Tom Baker with hiscompanions Sarah Jane Smith and Harry Sullivan.