Introduces Natasha Romanov, discusses how she became known as Black Widow, and shows how she contributes to the Avengers and S.H.I.E.L.D.

Introduces Sam Wilson, discusses how he became known as Falcon, and shows how he contributes to the Avengers.

Introduces the superheroes who comprise the Guardians of the Galaxy.

Introduces Clint Barton, discusses how he became known as Hawkeye, and shows how he contributes to the Avengers and S.H.I.E.L.D.