Davros (Palindrome)

In a parallel universe where the Thals and Kaleds lived in peace on Skaro for centuries, Davros was a Kaled scientist. Unlike his N-Space counterpart, Davros was an expert in transdimensional engineering, as was his Thal wife, Charn, and he initially didn't create any Daleks due to the Thousand Year War not occurring on this universe's Skaro.

However, when Davros began the final tests on a dimensional portal that he and Charn had spent decades creating, he accidentally allowed the Dalek Time Strategist to cross into his universe. Despite the efforts of the Eighth Doctor and Bliss, the Time Strategist succeeded in transforming Davros into a fusion of Davros's numerous selves from throughout the multiverse. As Davros's original personality was slowly erased in favour of a replica of his N-Space counterpart, Davros and the Dalek Time Strategist allied to resurrect the Daleks of N-Space through a similar process, annihilating Skaro (AUDIO: Palindrome) and eventually breaking back into N-Space to resume the Last Great Time War. After an altercation with the newly-resurrected Dalek Emperor, Davros was placed into stasis, as the Emperor believed that he would be useful in the Time War. (AUDIO:  Restoration of the Daleks)

Origins
Waking up five days after the first operation, a Dalek attack gets Charn, The Doctor and Bliss killed, and while trying to escape a Dalek shoots the inter-dimensional portal causing this Davros to travel up his own timestream.

After trying to figure out what was happening and meeting Bliss and The Doctor, he ended up talking to a future version of himself, (that he was not aware was his future self) he got convinced that he needed to destroy the portal to stop the suffering.

This caused him to travel to the very first activation of the portal where The Dalek Time Strategist to came through. After talking with the Dalek Time Strategist, Davros was manipulated into perceiving the Doctor as an enemy because he was a Time Lord, who had attacked Skaro in the distant past. The Time Strategist convinced Davros to help him restore the Daleks and destroy the Doctor by combining every version of every Kaled in the multiverse into one being, 'assuring' Davros that he would have the power to make the Daleks more benevolent and claiming that the Doctor wanted to destroy the Kaleds rather than the Daleks.

By doing this it started to change Davros. He started to change from his Kaled form to a more recognisable ‘decayed’ version and needed the assistance of his chair to move.

Eventually Davros met his past-self and convinced his past-self to destroy the portal and after trying to kill The Doctor and Bliss but finding out they could not die due to the portal; he concluded that he needed to destroy the portal once all of his Daleks were fully stabilised. (AUDIO: Palindrome)

The Daleks did stabilise in the end, but The Doctor and Bliss managed to escape to N-Space where they warned the Time Lords. (AUDIO: Dreadshade)

Amalgamation
The Daleks then used the parallel Davros as a dimensional anchor around whom they drew out, and merged, versions of Davros from several different timelines, reconstituting a passable imitation of the original Davros, (AUDIO: Restoration of the Daleks) who had previously been lost to the Daleks when his command ship flew into the jaws of the Nightmare Child, albeit to be rescued by a temporally-displaced Dalek Caan and later reemerge in the post-Time War universe. (TV: The Stolen Earth/Journey's End)

Having only needed him to reestablish themselves, the Daleks soon turned on their reconstructed Creator. The resurrected Dalek Emperor tried to kill him, but sparked a small-scale civil war in the process. Seeing use in the Davros simulacrum, the Dalek Emperor ultimately decided put him in stasis while waiting for his next use. (AUDIO: Restoration of the Daleks)