Phase One, also known as Avengers Assembled, is the first part of the Marvel Cinematic Universe and the first part of The Infinity Saga.
Tony Stark, a playboy and engineering genius, is captured whilst in Afghanistan demonstrating a new missile. Creating an armoured suit to help his escape, his technology will ultimately be put to greater use.
Bruce Banner is holed up in Rio desperately seeking a cure for the gamma radiation poisoning that turn him into a shorts-shredding monster. The Abomination, an elite soldier, squares up to the Hulk after a jab of the green stuff.
Having outed himself as a superhero, billionaire playboy Tony Stark is enjoying his newfound notoriety. He's not enjoying the attentions of the US government, however, who want him to hand over the secrets to the incredible armoured suits he uses to battle evil. Meanwhile, bearing a family grudge against Stark, Russian Ivan Vanko builds his own version of the suit, using it to attack his nemesis during a race at Monaco.
Agents Coulson and Sitwell plan to derail General Thaddeus 'Thunderbolt' Ross from interfering with SHIELD affairs with a special person.
Agent Coulson stops at a convenience store and deals with a coincidental robbery during his visit.
When a secret experiment turns frail kid Steve Rogers into a rippling, spandex-clad superhero, the fate of WWII rests in his all-American hands.
When an unexpected enemy threatens global security, SHIELD director Nick Fury builds a superhero 'dream team' of Iron Man, Captain America, the Hulk, Thor, Black Widow and Hawkeye to pull the world back from the brink of disaster.
SHIELD agent Sitwell is assigned to recover an abandoned Chitauri weapon being used by a couple robbing a bank.