Parallel world (Turn Left)
Donna's World was a rewritten version of the timeline created when Donna Noble turned right instead of left while deciding which of two different job interviews to attend.
- This name is strictly conjectural.
Background
While on the planet Shan Shen, Donna Noble was unknowingly fitted with a time beetle, part of the Trickster's Brigade. A fortune teller selected a point in her life where making seemingly random choice had enormous ramifications.
In June 2007 Donna had to make a choice between two jobs. The moment she chose between the jobs was at a junction. Her agency had offered her a contract with H.C. Clements, which while temporary, was posh and in the centre of London, which Donna enjoyed. Her mother, Sylvia Noble, had managed to get her another job opportunity to become the personal secretary of Jival Chowdry, owner of a photocopying business. Although this would be a permanent job, Donna found it less interesting.
While driving and in discussing the dilemma, Sylvia pressured her into "turning right" to stop by Jival Chowdry for a chat. While in the regular timeline Donna ignored her mother and turned left, in this timeline she turned right, resulting in her taking the PA job.
UNIT and Rose Tyler sent Donna back to the time where the worlds split. To make her past self turn left, she headed from her landing location to the road where her past self was in her car. Running out of time, Donna jumped out in front of a lorry. Although she died, a traffic jam quickly blocked the route right from the past Donna, so the past Donna chose to turn left. (DW: Turn Left)
Timeline
December 2007: The Doctor dies while defeating the Empress of the Racnoss since Donna wasn't there to make him leave. The TARDIS is salvaged shortly after this point and ends up in a UNIT "camp".
Rose Tyler meets Donna for the first time. Rose is unaware of Donna's importance at this point.
2008: The Royal Hope Hospital is taken to the Moon. However, there is only one survivor this time; Oliver Morgenstern. Martha Jones gave him the last oxygen tank so someone could tell ethe world what happened. The MRI was presumably stopped by Sarah Jane Smith. Luke Smith, Maria Jackson and Clyde Langer are mentioned.
Rose met Donna again and told her to leave London for the far-off Cristmas holidays.
December 2008: The replica of the Titanic crashlands on Buckingham Palace. London is destroyed and south England is filled with nuclear radiation.
2009: Sixty million Americans are fully converted into Adipose children. Presumably, the change in location is because of the crisis in southern England.
2009: The Sontarans activate the ATMOS devices and try to turn Earth into a cloning world. Jack Harkness, Ianto Jones and Gwen Cooper aka the Torchwood team ignite the "poison sky" and destroy the Sontaran flagship. Jack ends up stranded on Sontar while Gwen and Ianto die to save the Earth.
Rose meets Donna for a third time and tells her that she'll come with her in three weeks. Three weeks later, Donna and her grand-dad see the stars going out when Donna realises Rose is there and goes with her.
Negation
With the help of Rose and that version of UNIT, Donna is sent back to the "point of intervention" (when Donna turned right instead of left). When she realises that she cannot influence herself directly, she steps out in front of a haulage truck and causes a traffic jam that forces her younger self to turn left.
