Originally Posted by
Face Of Jack:
“I'd like to see a back story involving Davros as a walking scientist and the battle with the Thals erupting on Skaro. The Doctor might be tempted to thwart Davros and prevent the invention of the Daleks. Ohhh Lordy - it's a fixed point in time!!! Scrap that idea then. ('Fixed Points' never stopped Tennant!)
”
Before the Daleks encounter Capaldi's Doctor...he receives a message from Gallifrey ordering him to meet still walking Davros, befriend him and influence his work so that it is benevolent. At all costs he must keep his identity a secret. Any time kinkscan be sorted by Time Lords later
The Doctor, undercover, finds a much more welcoming and optimistic scientist than her remembers. They get on famously. All seems to go very well. Until someone innocently uses the word Doctor in an innocent context and he momentarily thinks he has been rumbled. This unsettles him so much that Davros becomes concerned and wants to help his new friend. Things start to occur that trouble both men, rumours of dark events elsewhere on the planet filter through.
The city in which Davros works is attacked, he attempts to assist the Doctor in defending the city, using weapons that have hints of Dalek iconic design elements. Dalek ships from the future assault the makeshift fortress the lead characters are holed up in and young Davros is appalled at what he sees trundling out of the smoke and flames.
He learns he is the creator of these abominations and when the doctor refuses to kill him, he announces that he will do it himself to prevent the creation of these things. One of them fires on Davros, who is terribly injured and as he is dragged away he begs the doctor to fire on him, the Doctor refuses. Davros never finds out the man he called friend is the doctor, and his raging as he is dragged away is that not killing him to prevent him doing work he will now be brainwashed/forced into doing is not the action of a friend, but the worst kind of enemy, that comes without weapons to destroy worlds with a smile...
So, the Tom Baker first meeting with Davros can still happen, with only the future Doctor knowing it is not the first time they have met.
The Daleks ensure their own creation by being alert to the presence of the Doctor across time. In this encounter, the Doctor can only ultimately run away, having failed Gallifrey and, ironically, failed a friend who has always been his enemy in his past lives and will consider him the worst kind of betrayer should they meet again (now brainwashed with, he-lied-to-you-he-is your-worst-en-emy.
So Davros has all the hatred of the Doctor he traditionally had, but refreshed with the new motivation: you said you were my friend...
So as far as Davros is concerned, The time lords were the first aggressors and the goal of exterminating those who would exterminate the Daleks is no longer aggression, but self defence. And Capaldi (and all future Doctors) will be meeting someone they personally could have saved from becoming what he became, giving a new dynamic to interactions between Davros and The Doctor (The Doctor remembers who Davros once was, Davros re-meeting his friend and discovering that he is in fact The Doctor).