Fantastic Four: World's Greatest Heroes/Episodes

Fantastic Four: World's Greatest Heroes is a 26 episode animated television series based on the Marvel Comics' Fantastic Four comic book series. In the United States, the show suffered an erratic airing schedule on Cartoon Network, premiering on the Toonami block on September 2, 2006 and running for only 8 of the season's 26 episodes before being pulled. It returned to the network starting June 9, 2007, shortly before the release of the film Fantastic Four: Rise of the Silver Surfer, but again, only nine further episodes were aired, leaving nine installments unaired in the U.S. The show aired on Boomerang for a brief time before moving to the Nicktoons Network in 2009 to air the final episodes.

The episodes that aired on Cartoon Network were, for the most part, aired out of order. In its intended viewing order, the first half of the series forms a loose story arc that spans thirteen episodes, focusing on the mysteries of the Negative Zone and Doctor Doom's attempts to exploit its power, in addition to stories pitting the FF against the Mole Man, the Puppet Master and the Impossible Man, with guest-appearances by fellow Marvel Comics heroes Ant-Man and the Incredible Hulk. Significantly, the FF clash with Ronan the Accuser and the alien Skrulls in two separate episodes, whose stories converge in the opening episode of the season's second half.

The second half of the series is less cohesive, featuring only single-episode adventures with villains such as the Frightful Four and Diablo and guest-appearances from superheroes Iron Man, Namor and She-Hulk. The series climaxes in an world-endangering appearance from Terminus, used instead of the FF's more notable globe-threatener Galactus, who was off-limits to the creative team.

All episodes of Fantastic Four: World's Greatest Heroes have been released on DVD in the United States. The Complete First Season was released on June 10, 2008.