The escalating power struggle between the Controller and the Dalek forces for control of the temporal operation and human collaborators

The Controller, a human collaborator with the Daleks, manipulates two Daleks into allowing him to interrogate the Doctor rather than execute him. He persuades them that human psychology, rather than …

The Daleks turn on their human Controller after his failure to recapture the Doctor, executing him in front of his subordinates as an example of absolute brutality. They immediately promote …

The Daleks murder the Controller after he fails to recapture the escaped prisoners. A loyalist replacement is appointed, but the commanding Daleks immediately issue their genocidal directive to prevent the …