Avengers Assemble Season 2 Episode 12 Widow's Run Episode Title:Widow's Run.Episode Description:Black Widow and Thor work to carry out Black Widow's plan to rid the Earth of the Infinity Gems upon Black Widow having a vision of Tony Stark using the Infinity Gems to become Emperor Stark and to dispose of them before Thanos returns to Earth. After an attempt to hide them in Asgard fails due to Black Widow's vision of Heimdall ruling Asgard, Black Widow and Thor are attacked by the Guardians of the Galaxy until the Avengers come to their aid. Afterwards, the Avengers are warned by Doctor Strange about the effects that the Infinity Gems are having on reality as Dormammu emerges from the portal. Seeing the fall of the Avengers, Black Widow uses the power of the stones. She manages to save them but the gems end up corrupting her. With the help of the team, she gives up the gems. Before they can take them to a safe location, Thanos returns and takes control of them. The Avengers are left behind to see the end of the universe.