Fantastic Four: World's Greatest Heroes

1x21 Atlantis Attacks

Air Date: 2007-09-15

Runtime: 22 minutes

Overview: 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.