Theory:Timeline - Petronella Osgood

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This page lists appearances of Petronella Osgood and her two Zygon duplicates, the first and the one originally known as Bonnie, in the order in which they experienced them. 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.

Timeline

Pre-Operation Double

Set during Christmas-time in 2011. Osgood hasn’t started working for Kate now, and they have only met on one previous occasion.

Shindi's Injury

According to Big Finish, Extinction is between The Power of Three and The Day of the Doctor. Josh Carter is a new recruit in Vanguard, placing this definitively as the start of the UTNS timeline. Shindi is injured fighting the Autons.
Osgood imagines the Eleventh Doctor visiting the Tower of London after allowing her mind to wander while showing Jay the thought projector, however it is left unclear as to whether or not she has met him.
Osgood recalls fighting Autons in the Gobi Desert, setting this after UNIT: Extinction.
Atkins is guarding the Black Archive.
The Antarctic winter won't end for another three weeks, setting this around August.
Shindi has recovered from his injury but is still using a wheelchair. Kate is doing extra weapons training following her encounter with Cerberus in UNIT: Shutdown. Shindi mentions that Osgood was away in Antarctica while he was recovering from his injury.
Set one month after Square One.
In Memory Alone is set several months after the end of Silent Majority. Sam Bishop claims that "Osgoods can't be duplicated", setting this before The Day of the Doctor. Shindi is no longer using a wheelchair.

Fighting the Silurians

Osgood believes that meeting Three Doctors at once would be a once in a lifetime experience, setting this before The Day of the Doctor.

Dealing With the Auctioneers

Jacqui McGee is now an established ally to UNIT, following the events of In Memory Alone. UNIT learn that a group known as the Auctioneers are selling alien technology on the black market.
Invocation occurs during Halloween.
The events of Encounters are recent and Shindi makes reference to the Shakri cubes.
Colonel Shindi is unfamiliar with the sight of flying Cybermen, while Osgood is thrilled to have survived meeting The Master, suggesting this takes place before Death in Heaven. The Master leaves UNIT with a parting gift, leading directly into Host of the Wirrn.
The Master's parting gift is revealed to be a Wirrn egg, which he took from the Auctioneers.

Further threats

Osgood mentions the Sontaran incident, setting this after The Sontaran Project. The year is given as "20 odd years" after 1999, setting this story sometime around 2019.
Sam mentions that they have survived Daleks and Cybermen, setting this after both Encounters and Cyber-Reality.
UNIT knows little about River Song and Kate Stewart meets her for the first time, setting this before Day of the Doctor where UNIT know more about River and possess a picture of Kate and River together. Upon arriving in the past, Osgood notes that none of the car number plates go beyond 1973. She also mentions that she is "40-odd years" in the past, setting this story around 2013. However Kate also mentions that 2091 is 70 years in the future suggesting a 2021 setting. River says that 2091 is "nearly 80 years" in the future, and Osgood also mentions this, indicating an early 2010s setting.
Osgood and Jo are close friends, setting this after UNIT: Assembled.

Operation Double

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. According to the novelisation, Atkins was killed by the Zygon Kate Stewart.
Set in 2014. Osgood is away investigating a UFO sighting, but has recently started wearing bow ties instead of her scarf and has yet to meet the Twelfth Doctor.
Kate has her first encounter with the Twelfth Doctor and Missy, the latter of whom murders the Zygon Osgood.

Opposing the Eleven

Operation Double Part Two

By this point, Kate is more than comfortable wielding a gun. 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.
The two Osgoods write a report on the zygons, recounting events from The Zygon Inversion.
Two Osgoods are present, placing this after the events of The Zygon Invasion/The Zygon Invasion
Set after The Zygon Inversion.
Jacqui McGee recalls The Silence. UNIT has already lost one Osgood. The Zygon Osgood labels herself as replaceable whereas the other Osgood isn't, indicating that the first Zygon Osgood was the one killed in Death in Heaven.
The Twelfth Doctor takes Osgood for her first trip in the TARDIS, however she refuses to reveal which Osgood she is. Whatever the case, the two of them encounter the other Osgood upon arriving back on Earth.
Kate and Osgood meet the Doctor, now based at St Luke's University with companions Nardole and Bill Potts.
Osgood is working with Kate.
Set in 2020, with the two Osgoods self-isolating. They are aware of the Thirteenth Doctor, and exchange texts with her. One Osgood refers to being a Zygon, while the other claims that she can’t relate indicating that she is the human.
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