The Reality War" is the eighth and final episode of the fifteenth series of the British science-fiction television series Doctor Who. Written by Russell T Davies and directed by Alex Sanjiv Pillai, it is the second of a two-part story alongside the preceding episode, "Wish World". The episode was released simultaneously on BBC iPlayer, BBC One, and Disney+ on 31 May 2025. Ncuti Gatwa stars in his final regular appearance as the Fifteenth Doctor. Varada Sethu and Millie Gibson star as his companions, Belinda Chandra and Ruby Sunday, respectively, in their final appearances. Numerous other performers from Gatwa's time on the show reprise their roles once more. Jodie Whittaker also returns as the Thirteenth Doctor, while the ending reintroduces Billie Piper, who previously played Rose Tyler, to the series when the Doctor regenerates.
