Fantastic Four #24

Earth is being invaded by subatomic particles from the other side of the universe - but what terrible secret do they hold inside? As Mr. Fantastic discovers the horrifying truth, he finds out something worse: There're some things in the universe that even he and his family's powers can't stop! And when everyone in the Baxter Building is close to being overwhelmed, a voyage to the end of time and space may well be Mr. Fantastic's only option! Voyage from the subatomic to the intergalactic in this Reed-narrated issue!