This Canadian production was a conglomeration of various Marvel Comics superheroes, each starring in his own segment of the show. The five superheroes included in the show were Iron Man, Thor, Prince Namor the Sub-Mariner, Captain America and The Incredible Hulk.

Prince Namor was an underwater anti-hero, reminiscent of Captain Nemo in his surliness and conflicted misanthropy. Half human and half Atlantean, Namor resented dry land dwellers and they returned the feeling heartily. Though he resolved to treat all landlubbers as enemies, Namor ended up defending the innocents among them as well as his own people against evil poachers and polluters.

Iron Man wore an armored suit to keep his damaged heart beating and that suit granted him powers of flight and near invincibility. When not battling evil nemeses, Iron Man was known as wealthy playboy and industrialist Tony Stark.

The Incredible Hulk was really Dr. Bruce Banner, a scientist whose self-experimentation went a bit too far and saddled him with unpredictable transformations into a big, green-skinned beast. Dr. Banner was as mild-mannered as a scientist could be, but the Hulk possessed none of that refinement and intelligence and popped up at the worst times.

The Mighty Thor had an impressive pedigree, being a Norse god and all but you wouldn’t know it if you met him in the guise of his alter ego, Dr. Donald Blake. The doctor feigned weakness but when the situation called for Thor’s special brand of smackdown, he tapped his walking stick to transform it into Mjolnir, Thor’s mighty hammer.

Captain America had a long and proud history of upholding law and order in comic books before he made his way to animation land. Captain used to be a scrawny World War II soldier until he volunteered to test a “super soldier serum,” which increased his strength, speed and agility to superhuman levels. He used his powers for good in the defense of American values against villains like the Red Skull and various Nazi nasties.

With so many characters and stories to churn out every week, animators saved time and energy by writing every story in cliffhanger format and using Xerography to transfer pencil drawings on animation cels instead of crafting each scene from scratch. This resulted in limited range of movement for the cartoons but the show made up for it in the action department, which was always fast and furious.