Theory:Timeline - UNIT

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This page lists appearances of UNIT in chronological order. This timeline is based upon observations of the Doctor Who universe and the events that occur during each of these stories. From these observations we have attempted to build a concise timeline. It is assumed that for each novel, comic, audio or television series, their published, broadcast or numbered order is the order they occur in.

Note that the placing of UNIT stories is especially complicated due to the UNIT dating controversy.

Timeline

20th century

The Doctor has had Bessie for a relatively short period of time.
The outcome of Doctor Who and the Silurians is still fresh on the Doctor's mind.
Tentative placement in regards to the "recent" falling out between the Doctor and Brigadier over the Silurians.
The Silurians occurred a few weeks earlier.
Liz has been working with UNIT for "a few months", and her complaints about her job here are similar to those that the Brigadier cites as her reason for leaving. The TARDIS console has also been removed from within the ship, as it was in The Ambassadors of Death.
This is the second time the Doctor has visited a zoo, setting this after The Arkwood Experiments.
The Brigadier finds it doubtful that the Doctor can get the TARDIS to work, setting this before Inferno.
The Last Post spans from Spearhead to just before Inferno.
Mike Yates arrives at UNIT and sees inside the TARDIS for the first time, and the Doctor mentions visiting the parallel universe from Inferno.
Liz decides to leave UNIT.
Liz announces her intention to leave UNIT.
Liz officially leaves UNIT, Yates is promoted to Captain Rank, and the Doctor is in a new laboratory.
Liz has recently left UNIT.
Liz is called back to UNIT, and has been absent long enough for the Doctor to admit missing her company.
After Prisoners of the Sun as the Master is active, unbeknown to the Brigadier.
Jo is still quite new to UNIT, and is unaware of the true nature of the TARDIS, setting it before The Claws of Axos.
The Mega were aided by the Master.
The Master has a working TARDIS, placing this after The Mind of Evil.
No one has seen the Master since Deadly Reunion.
Set immediately after The Dæmons.
Set soon after The Dæmons.
This is concurrent with The Curse of Peladon.
For the third Doctor, this takes place immediately after the Sea Devils, but before Find and Replace.
Jo recalls the Daleks and Ogrons, which places this firmly after Day of the Daleks. Likewise, the Doctor confesses that sheep have never filled him with dread before, placing this before Verdigris.
The takes place before the Green Death
Takes place soon after the Green Death.

The Brig encounters the fifth Doctor while the Third is having a break from UNIT.

The third Doctor returns from his Sabbatical from UNIT.
The Doctor is driving the "Whomobile", setting this after Invasion of the Dinosaurs.
The Doctor senses that he will soon regenerate.
The seventh Doctor implants the idea of the Brigadier retiring.

21st century

The Ninth Doctor identifies a group of alien experts from the United Nations Intelligence Taskforce.
First contact with the Toclafane is hosted on the UNIT aircraft carrier Valiant, designed by Harold Saxon.
UNIT is now known as the Unified Intelligence Taskforce.
Kate Stewart meets the Doctor, in his eleventh incarnation, for the first time.
According to Big Finish, Extinction is between The Power of Three and The Day of the Doctor.
Osgood hasn't met the Doctor yet.
Osgood and Kate meet the Eleventh Doctor as well as the War Doctor and the Tenth Doctor. Preventing the discovery of a Zygon incursion from erupting into war, the three Doctors force UNIT and the Zygons to make a truce which will become Operation Double. Befriending her Zygon copy, there are now two Osgoods.
Colonel Shindi is unfamiliar with the sight of flying Cybermen, while Osgood is thrilled to have survived meeting the War Master, suggesting this takes place before Death in Heaven.
Kate has her first encounter with the Twelfth Doctor and Missy, the latter of whom murders an Osgood. As the two Osgoods chose to keep the truth of their races between them, it is unclear whether the one who died was the human or the Zygon.
The Zygon group Truth or Consequences attempt to break the ceasefire until the Twelfth Doctor convinces them to stand down. Their leader, Bonnie, joins and assumes the form of the surviving Osgood, who still refuses to disclose whether or not she is herself human or Zygon until the time comes when it does not matter.

Unplaced

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