Doctor Who stars Tosin Cole and Bradley Walsh - who've played companions Ryan and Graham for the past two seasons - have confirmed that they're set to depart the TARDIS after the upcoming New Year's holiday special.
Whittaker stated, "As the Doctor, I will say that the fam as a four is no more".
But their mission becomes much more hard when another Jack (Chris Noth, who played forgettable season 12 villain Jack Robertson) introduces an army of deadly "drones" that are actually - you guessed it - Daleks, the Doctor's greatest enemy.
In an interview with BBC Studios, Cole and Walsh revealed that "Revolution of the Daleks" will be their final episode of Doctor Who, confirming a long-standing rumour that two of Jodie Whittaker's three companions would be leaving the series - leaving only Mandip Gill, who plays Yaz.
Walsh and Cole also addressed their departure. He added, "I was looking forward to have a rest though".
Walsh continued, "Working in Wales with everyone on the crew". "On a personal note, absolutely devasted!" He's a character very close to my heart who changed my life and to know the fans love him as much as I do makes his return even sweeter.
He said Wales "has become like a second home to me" and that he is pleased to have starred "in something so iconic and groundbreaking with the advent of having a female Doctor".
However, showrunner Chris Chibnall did leave the door open for them returning stating, "You'll have to wait and see, won't you!" "I loved them both, but especially Bradley Walsh- I loved his representation of us folks of a certain age".
Star of the stage and screen Dame Harriet Walter will also be making her Doctor Who debut for the Festive Special alongside television star Nathan Stewart-Jarrett who has recently appeared in The Trial of Christine Keeler.
The last time we saw the Doctor (Jodie Whittaker) at the end of the twelfth series, she was locked up in a high-security alien prison serving a life sentence for her "crimes" against the universe, with no hope of escape. However, they soon discover a disturbing plan forming. A plan which involves a Dalek. The classic Doctor Who villains have had plenty of looks over the years, but this is by far the most streamlined they've ever been.
Even with the aid of Captain Jack, the Doctor and her friends are about to face one of their biggest and most frightening challenges yet.