In a new weekly feature, we asked twenty Doctor Who fans for their opinions on the episode. They've all provided scores for different aspects of the episode, plus a small written review.
On Halloween, all across the universe, terrifying forces are stirring. From the Arctic Circle to deep space, an ancient evil is breaking free. And in present-day Liverpool, the life of Dan Lewis is about to change forever. Why is the Doctor on the trail of the fearsome Karvanista? And what is the Flux?
On average, the overall score for The Halloween Apocalypse was 8.5/10. A full breakdown of scores can be found below...
DOCTOR WHO FLUX: CHAPTER ONE
THE HALLOWEEN APOCALYPSE
Doctor Who continues Sunday nights on BBC One and iPlayer.