Dialogue from episode 8 "The Reality War" reportedly leaked. The episode is said to be around 54-55 minutes, hence why there are timestamps on the lines uttered
04:26 – “Myths are just science in its infancy.”
08:55 – “Time dulls the gods, just as it makes forgotten truths impossible to ignore.”
09:15 – “The sister is a bit of a Negative Nancy, isn’t she?”
10:01 – “Don’t follow me.”
11:01 – “If you see this man, push the button—understood?”
12:01 – “Nurse who?”
12:08 – “Look over there and read what it says: are you trying to get us killed?”
13:00 – “What is a spoon?”
14:38 – “What happened to ‘love thy neighbor’?”
15:08 – “Oh no, my dear—you’re just lacking a bit of vision!”
17:11 – “You’ve twisted the threads of life, death, and order for years—so why couldn’t I spin the same defiance into my own creation?”
22:21 – “They’re always there, you know. Scattered all around. I can smell them—hiding in the shadows like the cowards they are. At first I thought it was because of me… but now I think it’s something else. Oh, you know, don’t you? You finally know.”
29:21 – “Subtlety is essential; it’s something he never seemed to understand.”
30:03 – “You had the chance to be so much more than this—something eternal. But you chose weakness. Now look at yourself, all these years later, always hunting ghosts, always clinging to a world that never wanted to be saved. You’re nothing but a child!”
38:19 – “Make a wish on a star, make a wish on a star? Make a wish on a star!”
39:22 – “You don’t understand? I did this for you, for all of you. A world that doesn’t need the Doctor anymore… because I have become the cure. I did what had to be done, I bore the burden, I crossed the line, so that you wouldn’t have to.”
43:09 – “I’m here to take back the show, honey.”
43:58 – “Honestly, you both should think long and hard about your tastes in men.”
48:22 – “Do you remember our tree, Grandfather? The one we planted on the day we left.”
53:16 – “By the way, I loved the outfits.”
54:22 – “You’re not alone. You never were. We have walked beside you—with every step, with every heartbeat. And we are here now. Until the end.”
That lot could seriously read as though there is going to be a major ruction to precisely Who a certain actor has been playing. It would be an impressive bit of patching. Bold and courageous, but extremely likely to cause upset.