“This is speculation so we won’t be commenting,” a BBC spokesperson told RadioTimes.com. “Viewers will have to watch the Christmas episode to find out!”
The news broken by the Mirror earlier this morning suggests that Coleman had intended to leave during this year’s Christmas special, but later decided to continue alongside current Doctor Peter Capaldi causing a rewrite of the script.
“In the original draft of the script, she became an old woman who then died with the Doctor at her side,” a source said. “But after they were rewritten, she will now be seen returning to the Tardis, hand in hand with the Doctor.”
“I’ve just been keeping my mouth firmly shut,” the 28-year-old told RadioTimes.com earlier this month.
“You get good at keeping secrets – this one in particular is quite difficult because you don’t want to be evasive, and you want to answer questions, but at the same time I just look back at different points of the show, where we had things like Oswin [her first appearance] in Asylum of the Daleks, when people didn’t know, and it was just better.”
She added: “The show is better for the surprises. So that’s why we’re being very evasive. Very coy.”
However, she did admit that reports of her departure “could be misinformation”, which head writer Steven Moffat has admitted to for storylines in the past.
Doctor Who: Last Christmas will be on BBC1 on Christmas Day (25th December)
Sign up to the Radio Times newsletter for the latest TV and entertainment news