"The Fantastic Four!"
Reed Richards fires a flare over Central City (aka NYC) for the first time, summoning the team for a mission. The Thing, the Human Torch, and the Invisible Girl answer the call, and we see a flashback of the fateful adventure that created their awesome powers.
Dr. Reed Richards has spent years developing his spacecraft, but before it has been thoroughly tested, he learns that the Soviets will beat him into space. He calls his college roommate Ben Grimm, his sweetheart Sue Storm and her brother Johnny, and they launch, despite Grimm's concern about the unknown effects of cosmic rays.
The ship's shielding proves inadequate, and they crash land to Earth, not before becoming transformed by the mysterious rays. After some initial bickering, they pledge to use their powers to benefit mankind.
"The Fantastic Four Meet the Mole Man!"
Reed shows the team evidence that subterranean tunnels are showing up around the globe coupled with massive monster attacks. Reed pinpoints the center of the phenomenon, Monster Island, and the Fantastic Four confront the Mole Man in his lair.