Davros and the Daleks planned to destroy all creation with a ` reality bomb ' , which failed due to the interference of the Doctor and his companions , and due to Caan himself who had been manipulating the events unknown to either side . Davros and the Daleks plan to destroy reality itself with a `` reality bomb '' . The plan fails due to the interference of the Doctor , his companions and Caan himself , who has been manipulating events to destroy the Daleks after realizing the severity of the atrocities they have committed .