Fantastic Four: World's Greatest Heroes (2006)

S1E8 Imperius Rex

Title: Imperius Rex Plot: Namor the Sub-Mariner surfaces with an ultimatum prohibiting humans from the seas. Susan and Johnny dive beneath the waves to engage in talks, only to be captured in Atlantis. Meanwhile, Ben and Reed embark on a perilous journey, battling fierce sea creatures and confronting Namor himself to rescue their friends.