Fantastic Four: The Animated Series - Season 1 (1994)

The Skrulls are an alien race that plans to invade Earth and the first step in their plan is to discredit the Fantastic Four as the good guys.

Alien who calls himself The Watcher contacts the Fantastic Four to warn them of an incoming doom. Galactus, a unique terrifying gigantic nearly indestructible alien humanoid who devours whole planets, is coming to feed on Earth.

The Fantastic Four can't defeat Galactus, so they try to convince his slave and herald The Silver Surfer to help them somehow.

The Skrulls may have been defeated, but they want revenge, so they send a superior genetically modified Srkull - Superskrull - to take down the Fantastic Four.

Dr. Doom imprisons the Fantastic Four in his castle. Sue manages to convince Doom to tell her about his origin, in order to buy time for the other three to find a way out.

Doom continues to indulge Sue by telling her about his past. He is Victor von Doom the son of a helpful local who was wronged by the superstitious locals. Meanwhile, the other three must face Doom's traps on their way out.

As the dawn breaks, Doom wraps up his story. His interest in robotics led him to Reed Richards whom he grew to hate for his intellect and goodness. Doom and robots took over his country and now he has The Fantastic Four. Or does he?

A villain called the Mole Man, who lives underground, is readying himself to take over the world from below, but he must first deal with the Fantastic Four.

During an experiment, Reed accidentally creates a portal to the Negative Zone and Earth becomes a target of warlords.

Victor von Doom manages to steal Silver Surfer's unimaginable powers, given to him by Galactus, and becomes almost unstoppable.