Theory:Doctor Who television discontinuity and plot holes/Face the Raven

Although it's what's on screen that ultimately counts, the filming script for Face the Raven, released on the BBC Writers Room website on 26 November 2015, indicates several plot points left unclear in the final episode were originally included. They include (among others):
 * The old man (a.k.a. "Chronolock Guy") is not a Cyberman as some have interpreted Ashildr's dialogue to suggest.
 * Ashildr's tattoo does not disappear for Clara's death because, according to the filming script, Ashildr no longer had control over the raven once Clara changed the terms of the deal. Thus the tattoo remains with her throughout.
 * The disposition of Clara's body and the fact Rigsy keeps his memory is the subject of a cut sequence in which the Doctor carries her remains inside and instructs Rigsy to inform her family and Coal Hill School. He also demands that Ashildr not use retcon on Rigsy in order for him to both do this and remember the sacrifice Clara made for him.