— Doctor Who Official (@bbcdoctorwho) October 5, 2016
“We’ve got a wonderful Canadian actor – Justin Chatwin – who’s in it,” Capaldi beamed on Canadian TV. “He told me if I mentioned his name I’d get a free drink!”
The Time Lord continued: “[Justin’s] in it, which is brilliant. We just finished filming it on Friday. It’s very festive. I don’t know quite what I can say about it!”
“Justin is a superhero – as all Canadians are,” Steven Moffat teased.
As you can see, the pair were pretty cagey on the details as to how or why Justin’s character will be involved in the story. Could he be the Doctor’s temporary companion, filling in for a one-off episode before Pearl Mackie arrives in series 10? Or will he be the dastardly foe looking to spoil the Doctor’s Christmas fun?
With the Christmas special expected to air on 25 December on BBC1, we only have a few short months to wait before we find out.