Witness the Fantastic Four's newest adventures with the animated series "Fantastic Four: World's Greatest Heroes." Stream Episode 20: "Atlantis Attacks!" right now on Marvel.com!
The Sub-Mariner returns, but this time he needs help to defeat Attuma, who has taken over Atlantis. While Reed, Susan, and Ben head off to help free Atlantis, Johnny stays behind and faces an attack on the city from a giant mutant whale.
Stream all available episodes of Fantastic Four: World's Greatest Heroes here, with new episodes appearing every Wednesday.
Download episodes of "X-Men: Evolution" and "Wolverine and the X-Men" now on iTunes!
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