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The Marvel Action Hour was a syndicated television block from Marvel Productions Ltd (as "Marvel Films" (A Division of New World Entertainment)) featuring animated adaptions of Marvel comic book heroes the Fantastic Four and Iron Man. The Marvel Action Hour debuted in 1994. The Marvel Action Hour lasted two seasons before being cancelled.

The first half of the hour was an episode of Iron Man; the second half an episode of Fantastic Four (many episodes of which were direct recreations of episodes from the original 1960s series). During the first season, Stan Lee was featured speaking before each show about characters in the following episode and what had inspired him to create them.

The show underwent a notable modification when broadcast on the BBC in the United Kingdom; because the BBC does not feature commercial breaks, the two shows that made up the Marvel Action Hour would actually only have totaled about forty minutes, and so episodes of the 1980s Incredible Hulk series were added between the two original shows to bring the whole bundle up to the promised hour in length.

Season 2
Both the Fantastic Four and Iron Man were radically retooled for the second seasons, sporting new opening sequences, improved animation, and more mature writing, though noticeably missing the introductions by Stan Lee.

In some markets, the second season was known as Marvel Action Universe (with the addition of Biker Mice from Mars), which was the name of a previous syndicated programming block in the late 1980s