Sydney was a city located in New South Wales, Australia.
History
In the 1970s, a group of Daleks based underneath Antarctica captured a nuclear submarine, the USS Jefferson and used it to attack Sydney, destroying Sydney Harbour Bridge. Their plan to use the city as a base from which to convert humans into Daleks and conquer Earth was defeated by the Third Doctor with the aid of Lt Davis. (COMIC: *Sub Zero)
BOSS proposed that, after he conquered the world, they would get the Sydney Orchestra to play at his victory ceremony. (TV: The Green Death)
In 1982, Tegan Jovanka and Kyle met in Sydney. (AUDIO: The Waters of Amsterdam)
On 14 July 1993, the Seventh Doctor met with thirty-seven year old Dorothée in a café in Glebe, a suburb of Sydney. (PROSE: Set Piece)
In 1995, the Doctor, Ace and Bernice Summerfield visited the interdimensional café in Glebe. (PROSE: Set Piece)
In 1996, the Doctor, Chris Cwej and Roz Forrester visited Sydney for a week. (PROSE: Return of the Living Dad)
In the 20th century, the Doctor, Ace and Bernice visited Sydney. (PROSE: Virgin Lands)
The Third Doctor bought a beach house in Sydney while his house in Kent was being painted. (PROSE: Sleepy)
Sydney was one of ten major cities across the world, all of which had underground railways, where Coldfire Construction built a reactor within a period of 18 months as part of a plot by the Slitheen to drain the Sun's energy, operated by at least one Slitheen disguised using a skin suit made from a local. At somepoint in 2008, after Sarah Jane Smith foiled the Slitheen with the help of her friends at Park Vale Comprehensive School at Ealing in London, she contacted UNIT so they would clear up the Coldfire sites. (TV: Revenge of the Slitheen)
In 2009, Sydney celebrated the return of Earth from the Medusa Cascade with fireworks. (TV: Journey's End)
In 2010, Sydney was plagued by chronal waves caused by the SKARDIS which released prehistoric creatures into Sydney and aged the passengers of an aircraft greatly. The Tenth Doctor and Majenta Pryce investigated with UNIT. The last chronal wave the SKARDIS caused before it was destroyed froze parts of Sydney in ice from the Ice Age. According to the Doctor, it would take Sydney years to rebuild and recover from this new Ice Age. (COMIC: The Age of Ice)
At Christmas 2015, the Pyramid Eternia appeared in Sydney's harbour. (PROSE: Big Bang Generation)
In the 2010s, the Cyber-pollen clouds were above the Sydney Opera House. (TV: Death in Heaven) The Twelfth Doctor, Nardole and Bill Potts visited Sydney to escape from a sentient oil creature that had been in a puddle. (TV: The Pilot)
In 2096, Sydney was an independent city-state. (PROSE: The Indestructible Man)
The Eleventh Doctor, Kazran Sardick and Abigail Pettigrew visited Sydney on Christmas Eve. (TV: A Christmas Carol)
Undated events
The swindler Garron attempted to sell the harbour of the city to an Arab and was asked to sell the Opera House. (TV: The Ribos Operation)
Anton Mordillo wanted to give a concert at the Sydney opera house. (COMIC: The Great Mordillo)
References
Clara Oswald had a travel guide to Sydney in her collection. (TV: Dark Water)