Alternate timeline (Master of the Daleks)

In an alternate timeline, and the Dalek Time Controller allied together to conquer Earth in the 20th century and build a New Dalek Paradigm from the races they enslaved. (AUDIO: Master of the Daleks)

Origin
After being infected with retro-genitor particles, the Dalek Time Controller was banished from the Dalek Empire, as the Daleks recognised that the particles made the Time Controller an unnatural element in the Daleks's timeline. (AUDIO: The Monster of Montmartre) In retaliation, the Dalek Time Controller allied with to create a New Dalek Paradigm to conquer the universe in place of the original Dalek Empire; the Master offered to assist in stabilising the timeline in exchange for control over a select number of Dalek worlds. (AUDIO: Master of the Daleks)

The Dalek Time Controller used Dalek duplicates (AUDIO: A Life in the Day) to transport the Eighth Doctor's TARDIS to Montmartre, Paris, on Earth in 1921, to assist in the construction of a giant Dalek casing - the Red Pagoda - as a replacement for the Time Controller's original casing, which had been badly damaged by the retro-genitor particles. The Dalek Time Controller also created, from its own DNA, Adelaine Dutemps, a Dalek duplicate that worked in the Red Pagoda and lured the artists and criminals that gathered there backstage, where they were seized by the Time Controller and converted into Dalek Time Strategists, Daleks with an advanced understanding of temporal science that would also serve as the Time Controller's personal army.

Despite losing the TARDIS, the Eighth Doctor and Liv Chenka managed to reach the Dalek Time Controller in 1921. The Doctor briefly escaped the Red Pagoda, although Liv was captured by the Time Controller. When the Doctor returned, he left in his TARDIS - on Liv's demands - although due to the alterations made to the ship by the Dalek Time Controller, the Doctor lost control of the TARDIS. Meanwhile, the Master arrived at the Red Pagoda, along with an army of Daleks, from an alternate 1961, having arrived to ensure that said alternate 1961 came into existence. (AUDIO: The Monster of Montmartre)

The rise of New Skaro
Together, the Master and the Dalek Time Controller oversaw a full-scale invasion of Earth, and by 1961, all of Earth had been conquered by the New Dalek Paradigm and transformed into New Skaro. The Daleks ultimately killed millions of humans and enslaved the survivors in Dalek slave camps, designed to convert humans into Daleks; notably, unlike the Daleks of the Dalek Empire, neither the Dalek Time Controller nor the Master were concerned about the Daleks's genetic purity. During the Daleks's invasion, Molly O'Sullivan - married in this timeline under the name "Mary Carter" - witnessed her husband's death.

At some point, hundreds of Dalek saucers confronted a Sontaran fleet, including Glarn and Rastel, and exterminated the fleet; as the majority of humanity had either been killed or converted into Daleks, new species were needed for the Daleks to reproduce further, and so the cloning vats from the Sontaran ships were recovered and used to mass-clone Sontarans for conversion. Draconians were also enslaved to be converted.

When the Doctor crashed his highly-damaged TARDIS in the ruins of Moscow, he was recovered by Molly O'Sullivan and taken to a Dalek slave camp. He was eventually found by the Master, who had used the captured Liv Chenka's TARDIS key and his own TARDIS to locate the Doctor's TARDIS, and was nearly exterminated on the Master's orders; however, the Daleks instead took the Doctor and his TARDIS to the Dalek Time Controller's base of operations, under the Time Controller's orders.

Inside, the Master and the Dalek Time Controller betrayed each other, as the Time Controller knew of the Master's deceitful nature and desired to exterminate him upon capturing the Doctor. However, the Master then revealed that he had quietly programmed the Daleks to obey his commands upon his activation of a secret security protocol, but due to the Time Controller exposing the Master earlier than he had expected, the Master only had control of 75% of the converted Daleks, rather than the entire army.

As a result, a civil war broke out between the Master's Daleks and the Dalek Time Strategists, the latter of whom had arrived from Montmartre in 1921. Although the Master's Daleks had been programmed specifically to combat the Time Strategists, they began to lose the battle when the Eighth Doctor, having fully regained his memories after his crash-landing, hijacked the Sontaran cloning vats to rapidly grow Sontarans to fight the Daleks. In the ensuing chaos, the Dalek Time Controller stole the Doctor's TARDIS and escaped New Skaro, with Liv and Molly as captives. After the Master was distracted by the fighting Daleks and Sontarans, the Eighth Doctor stole the Master's TARDIS and escaped as well, stranding the Master in the middle of a three-way battle between Daleks, Dalek Time Strategists, and Sontarans. (AUDIO: Master of the Daleks)