Avengers : Season 1, Episode 1: "Iron Man is Born!"

“Iron Man Is Born!” - When the villainous organization known as HYDRA attacks the United Nations, the fate of the world’s leaders is in the hands of Iron Man! But Tony Stark may have met his match as HYDRA unleashes the Dreadnoughts against him! Iron Man has to overcome HYDRA, but is the world peacekeeping force known as S.H.I.E.L.D. any better? Plus, S.H.I.E.L.D. Director Nick Fury fights alone when the Grim Reaper infiltrates the super villain prison known as the Vault.