Jane smith dating unreliability of carbon dating
At the end of the "What Happened on Earth" portion of the second novel, she asks the Doctor about this, and he replies, "Temporal slippage. This solution was later reinforced by The Enfolded Time, where the Accord explains that the Doctor's regular visits to Earth from 1969 to 1989 in his faulty TARDIS disrupted the planet's timeline, enfolding time in on itself so that twenty years occurred over a ten-year period and the Accord is trying to repair the damage to strengthen it before a forthcoming war.
The obvious mix around of some of this history is then handled by the dating protocols.
The problem, which arguably should be called "the Brigadier dating controversy", exists primarily because of two appearances of Alistair Gordon Lethbridge-Stewart when he wasn't employed by UNIT.
The first was his debut story, The Web of Fear, when he was still a colonel in the regular British Army.
It is worth noting that the original intention of Mawdryn was for Ian Chesterton to return as a teacher.
But as William Russell was unavailable, it was ultimately decided that the Brigadier would return.
However, the events of The Invasion, the first story in which UNIT properly appears, approximately occurred in 1979.
When the Brigadier is talking to Liz Shaw in Spearhead from Space, he explains that "since UNIT was formed, there've been two attempts to invade this planet," no doubt referring to Web and Invasion; it is interesting to note, however, that UNIT was formed as a result of the events of Web, meaning the Brigadier is referring to the Cybermen and another, unknown invasion.Because it's flatly impossible to have the Brigadier retiring before he's even become the Brigadier, a fundamental discrepancy indisputably exists in televised Doctor Who narratives. While many stories have tried to give specific dates to a serial, very few have offered an overall answer to the problem.In Marc Platt's novelization of Downtime, Christopher Rice states that there were no "official" records of the Brigadier while discussing UNIT: 'Colonel Alastair Gordon Lethbridge-Stewart figures largely in its setting up in the Seventies.In that story the Third Doctor attempted to alter Jo Grant's memories as a way of protecting her.In the Eighth Doctor Adventure novels Interference - Book One and Interference - Book Two, published in 1999, Sarah Jane Smith is uncertain whether her experiences with the Doctor and UNIT take place in the seventies or the eighties. I think it's currently the 1970s, but —" and is interrupted by Sam Jones.
Consequently, the biggest period of UNIT involvement, the Third Doctor's era, has only comparatively mild contributions to the dating controversy.