The following gives some details about episode which might be considered a spoiler.
The episode is to be called The Girl Who Waited; says MacRae:
I went down onto the set quite a lot and it was great to see it filmed. It’s a real tear-jerker of an episode and it’s very much focused on Karen. Her acting in it is amazing. I know she’ll break the viewers’ hearts in two when they watch it, it’s so emotional.
MacRae hails from Northamptonshire, like the current Doctor Matt Smith:
It’s wonderful writing for Matt, he’s such a fantastic actor and a genuinely lovely guy. He’s about the same age as me, we’re from the same town and we’ve got a lot of friends in common, so it was great to work with him. And as The Doctor, I admire him so much. I’m a huge fan of what he’s done on the show, I would say he’s 'my Doctor'.
(newslink: Northampton Chronicle)