"This is the day you die..." Those forbidding words, uttered by Sacha Dhawan's Master, who is back to truly take down Jodie Whittaker's Doctor, echo though the trailer for her final episode, which also happens to be a feature-length Centenary Special. Unless you're saving yourself for the episode, check it out...
And it's not only the troublesome Master that will be causing problems in this swan song, as the Daleks and the Cybermen - including Ashad (Patrick O'Kane), also known as the Lone Cyberman - will also appear.
Fortunately for the Doctor, she will have Yaz (Mandip Gill) and Dan (John Bishop) in her corner - and it's interesting to note that it's Yaz's name she screams as she appears to start regenerating.
Plus there are some old friends of the Doctor - Tegan (Janet Fielding), who knew the Fourth and Fifth incarnations and Sophie Aldred's Ace, the tough nut sidekick of the Seventh.
"Jodie’s final feature-length story contains a plethora of treats and surprises for audiences and fans, not least the return of two of the most beloved companions in the show’s history," says departing showrunner Chris Chibnall. "They’ll be helping the Doctor fight on three fronts, against her deadliest enemies: the Master, Daleks and Cybermen, in one huge story! For the BBC’s Centenary, we’ll be celebrating the past, present and future of Doctor Who, in a fittingly thrilling, epic and emotional send-off for the Thirteenth Doctor."
The episode will air on the BBC and iPlayer later this year.