Captain America: The First Avenger is an American cartoon animated television series based on the Marvel Comics character of the same name. The series is an retelling Captain America's origins and follows Steven Rogers as his superhero alter ego, Captain America as he battles villains such as Hydra, A.I.M., the Serpent Society, Armadillo, and others. The series adapts the Earth-616 Captain Amerira comic books, the MCU Captain America film series, and the Ultimate Captain America comic books.