The Avengers: United They Stand The story involves the Masters of Evil and a flashback to Captain America defeating Baron Zemo. Iron Man, meanwhile in the episode "Shooting Stars", helps the Avengers thwart the Zodiac's plan to send radioactive satellite crashing to Earth. When the planet is threatened by Super Villains, time traveling conquerors, alien invaders, mythical monsters or mad robots bent on the total destruction of humanity, when the forces of evil are so overwhelming that no single hero has the power to save the world, when there is no hope left…the AVENGERS ASSEMBLE!