|The Marvel Superheroes consisted of five different segments, each starring a well-known superhero from a particular Marvel comic-The Sub-Mariner, Captain America, The Incredible Hulk, Iron Man, and Thor.
Steve Rogers (a.k.a Captain America) was a skinny World War II G.I. who volunteered to be a guinea pig for an experimental "super soldier serum." After taking the drug, Steve was endowed with heightened strength, speed, and agility, making him the finest specimen the human race had to offer. With the use of his newfound powers and a nearly indestructible shield, Captain America battled super villains like the Red Skull, as well as an inexhaustible supply of Nazi soldiers.
In order to meet the demands of presenting so many characters each week, the stories were told in a cliffhanger format, requiring fewer scripts. The creators also saved time through the use of Xerography, a process developed for Disney's 101 Dalmatians that allowed animators to copy pencil sketches directly onto animation cels, thereby saving them from having to redraw any scenes. While this technique resulted in a severe stiffness of the characters and almost no movement, it allowed the animators to churn out regular battles between our heroes and their super-powered nemeses.
Despite the limited animation, The Marvel Superheroes won its share of loyal fans. Namor, Captain America, and Thor continued to appear in later Marvel cartoons, and The Incredible Hulk and Iron Man later got shows of their own.