The Puppet Master turns the Thing against Fantastic Four, but his plans fall apart when his step-daughter, Alicia, falls in love with the Thing and sides with the team

Namor, the Sub Mariner, rises from Atlantis onto dry land. He encounters Sue and kidnaps her, wanting her to be queen of Atlantis

The Skrulls, a race of green skinned shape shifters, come to Earth and impersonate the Fantastic Four. They attempt to discredit them, hoping to keep them from interfering in their plans to conquer Earth

The enigmatic Watcher warns the Fantastic Four of the impending arrival of the herald of Galactus, the Silver Surfer. They learn if he summons his master, all of Earth will be devoured

As Galactus' plans unfold, the Fantastic Four try to reason with him, but it proves futile. The only way to defeat Galactus now, puts Johnny's life in mortal danger. Meanwhile, the Silver Surfer sees Alicia and his loyalties begin to change

The Skrulls let loose a new danger for the Fantastic Four to face, a being that possesses their combined powers: Super Skrull! Will the team be able to take this villain down?

Doctor Doom has captured the Fanastic Four, taking them to his treacherous castle

Sue learns about Doctor Doom's past, while the others deal with the castle's traps. When they find him, Doom offers a deal: travel back in time to retrieve an ancient casket or Sue will be killed

Reed, Johnny, and Ben arrive in ancient Greece, with only forty-eight hours to find the casket. Their problems multiply, however, when they get into the middle of The Battle of Thermopylae