Parallel universe

A parallel universe is a reality created when historical events diverge from the main timeline. Unlike alternate timelines, these occur naturally. Travel to parallel universes became impossible after the Last Great Time War. (DW: Rise of the Cybermen)

In the 1970s, the Doctor visited a parallel universe in which the United Kingdom was a fascist Republic ruled by an alternate Doctor. (DW: Inferno, NA: Timewyrm: Revelation)


 * ''For full details see the article Parallel Earth (Inferno).

Circa 1979, the Doctor visited a universe in which the Roman Empire spanned the galaxy and was beginning to conquer other universes. (DWM: The Iron Legion)

One parallel universe was lifeless and empty due to the destruction of Logopolis in 1981. (PDA: The Quantum Archangel)

In 2007, the Doctor, Rose Tyler and Mickey Smith visited a universe in which Rose's father was still alive. (DW: Rise of the Cybermen)


 * ''For full details see the article Pete's World.