Planning to conquer the planet, Loki gathers a band of supervillains and challenges the Marvel superheroes.
Dee Bradley Baker
During the quest to find Ultron, the Avengers fight Baron von Strucker.
Ultron minions fight with the Avengers in S.H.I.E.L.D.'s helicarrier and eventually discover Ultron wants to control the Iron Legion.
The Avengers plan a party for a special guest but Ultron takes control of Iron Man's armored suits and starts destroying the party.
Spider-Man receives important information; Iron Man become freed of Ultron's control.
The Avengers start following Ultron to save Iron Man; during a confrontation between Captain America and Thor with the Ultron sentinels, Vision discovers that Ultron used Yellow Jacket to infiltrate Tony Stark's armor.