 Dalek Sec conducts the first experiment on himself, fusing himself to the body of Mr Diagoras and becoming the first Dalek-human hybrid.Steven Moffat was initially assigned to the two-parter but pulled out from the episodes, offering to write the series' "Doctor-lite" episode "Blink" instead to make up for the inconvenience to the production team.Instead it was given to Helen Raynor, who is the first woman to write a televised Dalek story, and the first woman to write a story for the revived series.