Fantastic Four #15

It's the 65th anniversary of The Fantastic Four, and to celebrate, we've got an extra-large, extra-fantastic adventure for you starring everyone's favorite adventurers, spanning centuries of history and a universe of scientific progress! The Fantastic Four have been defeated: with their personal arrows of time reversed, they're careening into the past with no hope of salvation - unless a complete stranger can find out what they need. But even if she does, that will only get them halfway home, because there's still a threat in the present that's waiting to kill them - and that's IF they can...