Please note: mild spoilers lie ahead for The Doctor Falls.

There’s been no shortage of speculation as to who Samantha Spiro is set to play in this weekend’s Doctor Who series 10 finale, The Doctor Falls. Since her casting was announced, the theories have ranged from her playing the next Doctor, through to an older version of his granddaughter, Susan.

But Spiro has now been chatting to the Radio Times, and has confirmed that her role is neither of those. Instead, her character is called Hazran, and as Spiro said, “as far as she’s concerned she lives on a farm, and it’s a very beautiful rural setting”.

The farmhouse where Hazran lives comes under attack from the Cybermen, putting the children she’s protecting there under threat.

“She’s the sort of person who’s trying to hold it all together and probably wouldn’t be successful if it wasn’t for a bit of help that we get from the Doctor”, Spiro admits.

But is she certain she’s not really the next Doctor? Absolutely. The rumour broke “after I’d already finished filming, so I knew I wasn’t going to be the next Doctor”, she said.

The Doctor Falls is on BBC One this Saturday night.