Sydney is the most populous city in Australia.
Notorious international criminal Vanchat managed to obtain and sell a large amount of Chitauri metal to different buyers all over the world, most notably the Centipede Project, who used it to create an intravenous filter to inject the serum they developed.
Vanchat was arrested and successfully interrogated by S.H.I.E.L.D. following the kidnapping of Phil Coulson, revealing that one of the major purchases of Chitauri metal was located in a warehouse in Sydney.
Coulson's team of agents, under orders of Agent Victoria Hand, flew to Sydney until the helicopter used in the kidnapping was located at a laboratory outside the Mojave Desert, changing the course of the Bus so that Hand could personally led the assault on the laboratory.
John Garrett and Antoine Triplett entered one of S.H.I.E.L.D.'s safehouses in Sydney, with Triplett noticing that it was not the Four Seasons. Garrett asserted it was a good safehouse, as the one in Phuket didn't have mattresses, though the one in Cairo even had luxury sheets.
Before they could contact Coulson, Deathlok breached the safehouse, and both agents shot him with regular weapons and a Taser Projectile Launcher. The taser rounds managed to stop him, and Triplett was about to shoot him with an I.C.E.R. in order to knock him unconscious. The metal plates under Deathlok's skin prevented the dendrotoxin from penetrating his system, and he removed the taser projectiles from his body. Seeing himself cornered, Deathlok escaped, jumping through the ceiling of the safehouse.
- Contrary to popular belief, the capital city of Australia is Canberra and not Sydney.