The Doctor, along with his companions, was transported to Skaro at the point where Davros' Daleks were about to be created. Concerned that the Doctor might regard their strategy as cynical in the extreme, the Time Lords decided that the Doctor should not be told that Yarvelling's Daleks were to be allowed to emerge unimpeded. The Doctor was instructed to attempt to prevent the emergence of the Daleks; or at least manage to alter their time line and lessen their malign impact on future worlds. The Doctor was captured by the Kaled military and taken to the secret bunker facility some miles from the domed Kaled city. There he witnessed the first trials of the prototype Daleks.

Davros did not enjoy the full support of all the scientific elite based in the bunker. A number of them were repelled by the program that was being pursued and were resolved to frustrate the ambitions of Davros to create the new Dalek species. With their assistance, the Doctor was able to escape and reached the main Kaled city. Granted an audience with senior members of the Kaled government, the Doctor was able to persuade them to mount a full investigation into the activities of Davros.

With contacts within the Kaled government, Davros was alerted to the emergent threat to the Daleks. Davros was determined that the Daleks would continue and supplant the Kaled race he regarded as genetically doomed to mutation.

The Thals were desperate to win the war. They, in similar fashion to the Kaleds, had constructed a domed city, impervious to all orthodox weaponry. But they believed that a missile with a sufficiently powerful warhead would be sufficient to pierce the Kaled dome and destroy the city beneath it. The Thal plan was no secret. The Kaled leaders were confident that it would fail for the simple reason that their dome was constructed from a formula devised by Davros himself.

It never occurred to them that Davros would betray them in order to safeguard the Dalek project.

Virtually unaccountable to any higher authority, Davros travelled to the Thal city where he offered the Thal government a new chemical formula that would critically weaken the Kaled dome. His only request was that he be allowed to assist with the post-war reconstruction of Skaro.

The Thal leaders accepted the offer. After an intensive artillery bombardment, utilising the formula provided by Davros, the missile strike devastated the Kaled city.

From his bunker, Davros unleashed the small army of Daleks already produced onto the Thal city. Celebrating their apparent victory, the Thals had allowed their guard to drop. The prototype Dalek army entered the Thal city and engaged in a systematic extermination of those Thals they encountered

The Doctor returned to the bunker, using a ventilator shaft. By simple misfortune, he was captured by Davros and a squad of elite security troops. Davros interrogated the Doctor. Davros was fascinated by the Doctor’s claims to be a Time Lord capable of travel through time, as well as space. More importantly, Davros was concerned to learn of the future history of the Daleks.

The interrogation yielded substantial volumes of information about future Dalek history. The sheer irony horrified the Doctor. He had been sent to lessen the impact of the Daleks; his forced testimony could enable them to avoid future defeats and indeed achieve the utter predominance predicted by the Time Lords.

Even at this stage, it seemed as if Davros might be prevented from launching his Daleks into history. A coalition of concerned scientists and security troops were determined to remove him from power. Confronting Davros after a brief insurrection it seemed as if the deformed scientist would give in to their demands. The Doctor had been released as a result and was able to destroy the tape recording of his interrogation.

Using stolen explosives, the Doctor was able to destroy the incubation chamber where the Kaled / Dalek mutations were being created. At the same time, surviving Thal troops had regrouped and were determined to destroy the Daleks by blowing up all entrances to the bunker and sealing them underground.

Davros had recalled the Daleks from the Thal city. Once the rebel scientists had made their positions clear, he brought the Daleks into the control room. There they exterminated the disloyal scientists. It was not readily apparent, but the Daleks were on the brink of developing autonomous decision making powers.

Davros became aware that a production line had restarted without his express order. Furiously, he demanded to know which of the ‘loyal’ scientists had given the order. After a few moments, a Dalek explained that it had given the order. This moment was critical in Dalek history. They were evidently capable of independent thought processes and had reached the conclusion that as Davros was not a Dalek, he was not to be obeyed.

Davros attempted to reassert his lost authority but was exterminated by the Daleks. Their emergent ‘leader’ addressed the Dalek cohort, stating that they would eventually emerge and embark on a program of universal conquest.

The Doctor left Skaro knowing that his mission had failed but was confident that the Daleks had been delayed for perhaps a millennium.

In the aftermath, the Thals migrated to previously unsettled parts of Skaro. Disgusted at their role in the near destruction of Skaro’s environment, they resolved to be pacifists and farmers.

On Gallifrey, the High Council observed as the Daleks' timeline adjusted. Davros would not mastermind the Dalek rise to galactic 'superpower' status. Without his genius, the Daleks would not be able to master the laws of space-time and threaten Gallifrey. Instead, the Daleks would develop into little more than a technologically advanced 'robber baron' species.

Of course, there were minor disadvantages to the alteration of Dalek history. Yarvelling's Daleks would still conquer 22nd Century Earth. Davros' Daleks would no longer create a temporal paradox to supplant that conquest; but this meant that the original invasion would happen. However, the first Doctor's intervention would defeat that invasion.

Studying the Matrix, the Time Lord hierarchy observed the eventual emergence of Davros' Daleks from the Bunker. But in the altered Dalek timeline, they did not stop to build a capital city on Skaro. Instead, under the leadership of the Supreme Dalek, they took abandoned Thal space-flight technology, altered it and launched themselves into space.

There were wars over the following centuries. Wars were fought with the Thals, the Draconians and the Earth Federation. The Daleks did win a few battles; but they lost every war with any of the major space powers. Without Davros' strategic foresight or supreme genius, the Daleks were no threat to 26^th Century Earth let alone Gallifrey.

The Daleks opted for a strategy of invading previously unknown regions of space.  By the early 27^th Century they encountered the Movellans.

There was a mystery surrounding the origins of the Movellans. They were humanoid robots with ruthless fighting capabilities. Their space fleet was the equal of that of the Daleks in every sense. For decades, the two fleets confronted each other in deep space. Both sides were reliant on advanced battle computers. Both computers dictated that no shots should be fired until a clear tactical advantage had been secured.

The Supreme Dalek was the sole survivor of the original prototype Daleks developed by Davros in the Kaled bunker. It realised that the only prospect of victory lay with resurrecting Davros and seeking his help in devising a strategy for victory over the Movellans.