The Avengers are attacked by robotic versions of themselves as part of Ultron's plan to replace humanity. One by one, each team member is captured until Captain America stands alone against Ultron and his synthezoid Avengers.
Season 2 Episode 16 of Avengers: Earth's Mightiest Heroes resulted in a 0.00 rating in the 18-49 demographic.
This animated series follows the adventures of the infamous Marvel Comics superhero team the Avengers - primarily consisting of Iron Man, Thor, Captain America, the Hulk, Ant-Man (a.k.a. Giant-Man), Wasp, Hawkeye, and the Black Panther - as they team up to save the world from dangers far too great for one superhero to handle alone.
The Avengers frequently work with S.H.I.E.L.D., a peacekeeping agency run by Nick Fury (while the two aren't competing to save the world by their own means, which are often quite different).