You will Watch Fantastic Four: Worlds Greatest Heroes Episode 21 online for free episodes with HQ / high quality. Stream cartoons Fantastic Four: Worlds Greatest Heroes Episode 21 Atlantis Attacks Namor 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.
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