107 Baker Street

107 Baker Street, postcode W1U 65P, (AUDIO: Fugitives) was a house in London owned by the Doctor from at least his fourth incarnation, and used by him and his companions throughout the 19th, 20th and 21st centuries.

Layout
The house was multiple stories tall, (AUDIO: The Haunting of Thomas Brewster) and had a secret cellar, which was accessed through a false wall in the larder in the parlour, as well as a priest hole (AUDIO: The White Room) and an attic, (AUDIO: The Haunting of Malkin Place) which boasted its own bedroom. (AUDIO: The White Room) By 1980, it had a television with three channels. (AUDIO: The Movellan Grave)

After the house was left to him in 2008, (AUDIO: A Perfect World) Thomas Brewster subdivided it into five flats. It included a big apartment on the second floor; flat 2 was on the ground floor. (AUDIO: Lost Property)

19th century
The Fifth Doctor owned and lived in the house from November 1866 to November 1867 while making repairs to the TARDIS. (AUDIO: The Haunting of Thomas Brewster)

In 1894, the Sixth Doctor, using the alias "Professor Claudius Dark", told his friends Henry Gordon Jago & Professor George Litefoot to go to the house dressed as the fictional characters Sherlock Holmes and John Watson. There they met the creator of the characters, Arthur Conan Doyle, who had been told where to meet the investigators by "Professor Dark". (AUDIO: The Monstrous Menagerie) During their stay there, they were joined by Ellie Higson, who helped them to defeat Remorse. (AUDIO: The Night of 1000 Stars)

Jago and Litefoot later visited the house to leave a message for the Doctor to visit them. (AUDIO: Masterpiece)

20th century
In 1918, Molly O'Sullivan stayed in Baker Street after leaving the front lines. After she left with the Eighth Doctor, Molly gave David Walker the keys to the house. (AUDIO: The White Room) David lived in the house until the 1970s. In the interim, he married a woman named Isabelle and they raised their two sons, one of whom was named Nigel, in the house. (AUDIO: Eyes of the Master)

In the 1920s, River Song stole the Doctor's TARDIS, left at Baker Street by the Fourth Doctor. (AUDIO: Whodunnit?) Indeed, the Eighth Doctor avoided the house during his time in 1921, due to its use by his fourth incarnation (AUDIO: A Life in the Day) after he'd been stranded in 1917 with his TARDIS in 1922. During this time, the Fourth Doctor and Romana had been staying in the house, where they'd received cryptic notes from the future Fourth Doctor in the attic. (AUDIO: The Haunting of Malkin Place)

In 1940, the Eighth Doctor parked his TARDIS at the house, because he didn't trust Churchill having access to the TARDIS. Churchill later had himself and Liv Chenka driven to the house, so Liv could contact Heliyon from the TARDIS. (AUDIO: Their Finest Hour)

Earlier in their respective timelines, the Eighth Doctor and Liv stopped at the house in 1963. (AUDIO: The Red Lady)

Following a confrontation with, the Doctor went off alone, leaving Liv Chenka and Molly O'Sullivan to live in the house (AUDIO: Eyes of the Master) in 1972. (AUDIO: Lost Property) One day while living there, Liv helped the alien Lila to escape from Earth. (AUDIO: The World Beyond the Trees) Later, the Master and Sally kidnapped Molly from Baker Street. (AUDIO: Eyes of the Master)

In 1980, Romana and the Fourth Doctor stayed in 107 Baker Street once more. (AUDIO: The Movellan Grave)

21st century
In 2008, the Fifth Doctor, Nyssa, and Thomas Brewster returned to the house, by which time the furniture was falling to pieces and covered in cobwebs. After their stay in London, Brewster decided to stay behind in the city, with the Doctor allowing him to stay in and maintain the house as a parting gift. (AUDIO: A Perfect World) During his time there, Brewster subdivided the house into five flats, with building work done with loans against the property. (AUDIO: Lost Property)

Brewster had vacated it by 2011 (AUDIO: The Crimes of Thomas Brewster, The Feast of Axos) or 2010. (AUDIO: Tales from the Vault) After his departure, the building began to deteriorate, and it stood without an official landlord for almost a decade.

Tania Bell moved into flat 1 in around 2014, (AUDIO: Lost Property) as she worked for Torchwood who were waiting for the Doctor to return to the house. (AUDIO: Must-See TV) Soon after she moved in, Ron Winters and Tony Clare moved into Flat 3. Later, sisters Aisha and Zakia Akhtar moved into flat 2. (AUDIO: Lost Property) The tenants had been carefully chosen by the Curator. (AUDIO: The Keys of Baker Street)

In an alternative 2020 created by the TARDIS crashlanding, (AUDIO: Crossed Lines) the Eighth Doctor, Liv Chenka, and Helen Sinclair became stranded in London, and turned up to their house to discover for the first time that it had been subdivided into flats. The Eighth Doctor took up the role of landlord, and moved into the attic, while Helen and Liv moved into flat 4. Around six weeks after the Doctor's arrival, Ken Bright-Thompson and his son Robin Bright-Thompson moved into flat 4. (AUDIO: Lost Property) Mr Bird moved into the attic, and the Doctor moved into flat 4 with Liv and Helen, although this turned out to be a temporary arrangement after Bird vanished upon the discovery he was spying on the other residents. (AUDIO: Must-See TV) The Bright-Thompsons later relocated to Scotland, much to Robin's indignation. (AUDIO: Dead Time) After reality broke down due to the Doctor's attempts to alter the Bright-Thompson's past went awry, 107 Baker Street was all that was left, filled with echoes of its recent past, though it too was consumed by the Void.

After the Curator helped reset the timeline to the true 2020, (AUDIO: The Keys of Baker Street) the Doctor, Liv and Helen lived with the residents for a year until time had crystallised, staying in the property during the lockdown caused by the COVID-19 pandemic. At the start of 2021 they departed, though Liv decided to return to stay for good with Tania. (AUDIO: Best Year Ever)

Alternate timeline
In one alternate timeline, the house was the base of the Ides Scientific Institute in 1970 due to the interventions of Kotris, (AUDIO: Eyes of the Master) In 1972, the Eighth Doctor and Molly O’Sullivan visited Baker Street. Shortly after the Doctor arrived, a time-space portal opened and Daleks came through, chasing the Doctor, Molly O'Sullivan and Sally Armstrong from the property. They returned to get back to the TARDIS but Sally was killed by the Daleks. (AUDIO: Fugitives) After Kotris was erased from history, the events were undone meaning Sally returned to life, the house was no longer destroyed and the Ides Institute was no longer located in Baker Street. (AUDIO: X and the Daleks)

In another alternate timeline, 107 Baker Street was destroyed by a bomb in 1941, with ruins remaining untouched until 2020. (AUDIO: The Keys of Baker Street)

Behind the scenes
The real world location is home to a Betfred branch, a betting company based in Gibraltar. This building has the postcode W1U 6RP (as opposed to W1U 65P for the DWU house), meaning they have the same district code (W1U) and indeed the same sector code (W1U 6). The single character difference between them is possibly an error, as all real world addresses in the district end in a two letter unit.