I’m just going to chuck some stuff here.

First of all, woman doctor please. It’s about time we had a serious one. Or a minority, i guess. No discrimination, but I probably won’t be casting a white guy.

I would do a proper reboot. Post-S10 stuff is just so hard to include, I’d build up my own canon and work from there.

Something I want to play with is the impossible age of the doctor. I would canonise the war doctor “resetting” the Doctor’s age, so they’d be what like 4000 years old? It would be good to properly play with this and its existential ideas. They might struggle to see humans as individuals.

A more diverse tardis, of course. A medieval companion would be fascinating. Maybe a future one too. Conflict might write itself, at last. No romantic relationship with the doctor.

If I had several season arcs, I think it would be cool if the first season builds up the Doctor’s love for one of the companions, maybe they adopt the two early on but start favouring one, eventually chucking the other out. What I think would be beautiful for the finale is if the whole trope of “save your loved one or save the world” finally actually pays off.

I think a good way to bring the doctor closer to this companion would be to have them, during the season, gain either immortality or an extended life span. Maybe, very specifically, this splitting into three sub-arcs, done in 3 or 4 episodes.

Arc 1: The Doctor meets two companions. One medieval and one modern. They are both infatuated with the doctor and excited to adventure. At the end of this arc, the medieval companion achieves immortality or an extended lifespan, done in the final or penultimate episode. In the final episode, the medieval companion is lost somewhere in time, perhaps in the past or the future. The doctor for some reason can’t see them again ever until much later.

Arc 2: The modern companion and the doctor fuck about, but the modern companion’s previous suitableness to the tardis begins showing holes. The modern companion also starts yearning for home, and begins to dislike the danger that the tardis presents. The doctor also can’t stop thinking about the other companion, and neglects the modern companion. A good way to foreshadow this might be to have the future companion meet the doctor at the start of the season, so the doctor can’t meet the medieval companion until they’ve become the future companion.

Somewhere here there should be a time lord episode.

Arc 3: The medieval companion returns, after having lived hundreds of lifetimes just like the Doctor. They are no longer medieval, but are well versed in future stuff and are therefore a future companion. The Doctor and this companion reconnect. The doctor neglects the modern companion, causing them to lash out in a way that can’t be forgotten. The modern companion realises that they cannot stay in the tardis, and demand to be left alone. The doctor tries to spin it as if they are forcing the modern companion out of the tardis because of the lash out.

In the season finale, there is some gargantuan threat that at some point manages to cause the whole “your loved ones or the world” dilemma. The threat forces the modern companion back into danger against their will, tearing them away from a scene showing how they’re starting to build themselves a steady life.

The threat of the finale threatens to end either the Earth or the Doctor’s companions. The Doctor, in a moment of weakness, chooses their companions. This time, the earth actually dies. The future companion, jaded by their long life as the doctor is, cares less about the end of the earth. The modern companion finds this unforgivable, breaks down, and just wants to be left on some planet and try to salvage a life for themselves.

Then god knows what season 2 is about, but the doctor’s guilt would have to play a large role. Here are my ideas for a fulfilling finale that ties back to the season 1 finale, and resolves the dead earth.

Perhaps one story occurs on the alien planet the modern companion is set up in, one again showing how they’ve built themselves a comforting life. The doctor might struggle to keep the conflict away from them, and perhaps fails in some small way. The doctor promptly leaves the planet as soon as they can.

The general arc of season 2 must involve the doctor doing things that should horrify the future companion, but they are both jaded by their inhumanity.

In the penultimate episode, the doctor comes across either some important information or a macguffin that would allow him to reverse his decision to let the earth die to save his companions. This thing must involve the time lords, and the sacrifice of someone connected to the old earth. The only two left are the modern companion and the future companion, but the doctor doesn’t even think of sacrificing the future companion. They in their pragmatism decides to try to sacrifice the modern companion to save the earth.

This thing must have no certainty in working. The audience needs to not be convinced so they can side with the time lords for the finale.

The season finale is a base-under-siege episode, but it is the time-lords under siege and the doctor is the enemy. It is shot from the perspective of the time lords, who believe the macguffin won’t work or the important information is misled. The audience must be convinced of the time lord’s perspective. The doctor takes on an antagonist figure as we watch the time lords desperately put up defences to try to stop the doctor, and ultimately fail.

In the climactic scene, the future companion finally breaks through the cognitive dissonance of loving the doctor and realises that they could be the sacrifice instead. They realise that the person they have become through living an ancient life and loving the doctor is someone they no longer want to be, and that death while saving the modern companion is preferable to continuing.

At the end of the season finale, the Earth is restored (with a small scar that I want to be the Cardiff rift from the 9th and 10th doctor era), and the doctor goes into grief. The modern companion is allowed to return to earth, but they are forever changed.

God knows what the next season will be.