‘It’s your moon, womankind. It’s your choice.’ A contentious episode provoking passionate responses, Peter Harness’ Kill the Moon (2014) straddles the divides between science fiction and fantasy, optimism and pessimism, masculinity and femininity. All these tensions extend into its ambiguously metaphorical conclusion. In addressing complex issues of personal and political choice, Kill the Moon asks fundamental questions about structures of power and responsibility in Doctor Who, and about the evolving relationship between the companion and the Doctor.