Avengers: United They Stand - Season 1 (1999)

Hawkeye must face his past and old mentor, the Swordsman.

Strange remnants of Ultron's previous experiments create terror on an island where France's main nuclear testing facility exists.

The Avengers must stop the Masters of Evil, who are trying to steal a shipment of highly dangerous government weapons. Meanwhile, Ant-Man feels threatened by the arrival of Captain America, a founding Avenger.

Mysterious underwater earthquakes are occurring, so the Avengers head to the sea kingdom of Atlantis to talk to its ruler Namor.

When satellites are blasted out of their orbits, the whole world is threatened. The Avengers recruit Tony Stark into their ranks to assist them.

Vision volunteers to be "bait" to allow himself to be captured by Ultron as a way for the Avengers to track him to the villain's lair. But he finds himself torn between two loyalties.

Egghead initiates a plot to destroy his archrival Ant-Man.

Scarlet Witch visits Agatha Harkness accompanied by Vision to see what she can do for Wonder Man.

Something is dangerouly affecting the magnetic fields of the Earth.

Someone wants an ancient meteorite buried beneath an island.