Season 1
Episode: 1x01 | Airdate: Oct 30, 1999
An evil robot named Ultron creates an android called the Vision and sends it to destroy Ant-Man, the leader of the Avengers. To get Ant-Man's attention, the Vision attacks the US President.
Episode: 1x02 | Airdate: Nov 6, 1999
Wonder Man is put on life support and the Avengers must take over where he fell. Meanwhile, Hank meets his worst creation ever, Ultron.
Episode: 1x03 | Airdate: Nov 13, 1999
The Avengers battle Kang the Conqueror, a time-traveler attempting to take over the world.
Episode: 1x04 | Airdate: Nov 27, 1999
Hawkeye must face his past and old mentor, the Swordsman.
Episode: 1x05 | Airdate: Dec 4, 1999
Strange remnants of Ultron's previous experiments create terror on an island where France's main nuclear testing facility exists.
Episode: 1x06 | Airdate: Dec 11, 1999
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.
Episode: 1x07 | Airdate: Dec 18, 1999
Mysterious underwater earthquakes are occurring, so the Avengers head to the sea kingdom of Atlantis to talk to its ruler Namor.
Episode: 1x08 | Airdate: Jan 22, 2000
When satellites are blasted out of their orbits, the whole world is threatened. The Avengers recruit Tony Stark into their ranks to assist them.
Episode: 1x09 | Airdate: Jan 29, 2000
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.
Episode: 1x10 | Airdate: Feb 5, 2000
Egghead initiates a plot to destroy his archrival Ant-Man.
Episode: 1x11 | Airdate: Feb 12, 2000
Scarlet Witch visits Agatha Harkness accompanied by Vision to see what she can do for Wonder Man.
Episode: 1x12 | Airdate: Feb 19, 2000
Something is dangerouly affecting the magnetic fields of the Earth.
Episode: 1x13 | Airdate: Feb 26, 2000
Someone wants an ancient meteorite buried beneath an island.