The Daleks threaten to destroy the TARDIS unless the Doctor helps them by conducting an experiment to isolate the "Human Factor", the unique qualities of human beings that have allowed them to consistently resist and defeat the Daleks. Once the Doctor has isolated the Human Factor, he will implant it into three Daleks, who will then become the precursors of a race of "super" Daleks, with the best qualities of humans and Daleks. To that end the Daleks want the Doctor to test Jamie by sending him to rescue Victoria, who is being kept in the house. The Doctor is strangely cooperative with the Daleks, manipulating Jamie into the rescue mission but not telling him of the nature of the test.