Steffan Alun appeared uncredited in the Doctor Who television story The Day of the Doctor as one of Bentham's Men. (DWMSE 38) He also wrote the short story Amser Gwyllt in Wildthyme in Purple, as well as A Lady Doctor, an online Iris Wildthyme short created on the occasion of the announcement of Jodie Whittaker's casting as the Doctor, and which contained unlicensed mentions of mentions of the Thirteenth Doctor, the Time Lords, Davros, the Great Vampires, and The Infinity Doctors.