Sydney

Sydney was a city located in Australia.

In the 1970s, a group of Daleks based underneath Antarctica captured a nuclear submarine and used it to destroy Sydney. Their plan to use the ruined city as a base from which to convert Humans into slaves and conquer Earth was defeated by the Doctor with the aid of Lt. Davis. (TVA: *Sub Zero)

The destruction of Sydney was not reflected in any other story.

On 14th July 1993, the Doctor met with 37-year-old Dorothée in a café in Glebe, a suburb of Sydney. (NA: Set Piece)

In 1995, the Doctor, Ace and Bernice Summerfield visited the interdimensional café in Glebe. (NA: Set Piece)

In 1996, the Doctor, Chris Cwej and Roz Forrester visited Sydney for a week. (NA: Return of the Living Dad)

The Doctor bought a beach-house in Sydney while his house in Kent was being painted. (NA: Sleepy)

In 2009 Sydney was one of the cities seen celebrating when Earth is returned. (DW: Journeys End)

In 2010, The Doctor and Majenta Pryce investigated an incident where a Chronal Wave caused the passengers of an aircraft to age several hundred years. (DWM: The Age of Ice)

In 2096, Sydney was an independent city-state. (PDA: The Indestructible Man)