https://www.theguardian.com/tv-and-...w-series-companion-interview?CMP=share_btn_tw Interesting that interviewer and interviewee both refer to the character being introduced in the Xmas Special, when this had supposedly been debunked. (I’m guessing a cliffhanger cameo to lead into a trailer for series 10)
Maybe it's like a Clara thing, we didn't really get the "real" Clara until Bells of St. Johns (Although she had a short cameo at the end of the Snowmen). Although it'd be nice to get a regular companion for a change, one that doesn't have some great pre-ordained destiny to fullfill.