Parallel universe (Sympathy for the Devil)

There existed a parallel universe where the Third Doctor was exiled not to England in the 1980s, but to Hong Kong in 1997. (AUDIO: Sympathy for the Devil) This one difference led to a universe radically different to the prime one, so much so that its Doctor once expressed the opinion that his home reality was "wrong". (AUDIO: The Library in the Body)

Following a cataclysmic war, this universe was reduced to a shadow of its former self. The Doctor was the ruler (AUDIO: The Library in the Body)

This universe was connected to the prime universe via the Gateway. (AUDIO: The Library in the Body)

Pre-War
On one planet, a great ruler decreed that "no one need ever truly die"; he gave his people the ability to "renew their bodies and their minds". If they grew tired of life, their "spirits" could "wander in the Garden of Souls". They became the rulers of time and space. All races in the universe knew of them and feared them. (AUDIO: The Library in the Body) It was from these people - the Time Lords - that the Doctor sprang. He left his homeplanet and became a renegade.

On Earth, Professor X became a popular series. During a visit to Earth, the Doctor's TARDIS became stuck in the form of an Earth police box. The Doctor helped Alistair Gordon Lethbridge-Stewart prevent the Great Intelligence from invading London with an army of Robot Yeti. (AUDIO: Sympathy for the Devil)

The Great War
When the war was at its worst, the Kareem were formed. (AUDIO: The Library in the Body)

Post-War
With the rest of his people dead, the Doctor was appointed ruler of the universe. (AUDIO: The Library in the Body)