50th issue celebration! “Remembrance of Things Past!” Guest-starring the Thing. Mr. Fantastic cameo. Story by John Byrne. Art by John Byrne and Joe Sinnott. Cover by George Perez. Ben Grimm’s body is becoming used to being the Thing effectively rendering Reed Richard’s cure useless. However, when Ben learns the formula would have worked on him years earlier he uses Doctor Doom’s time-machine to travel back in time to cure himself. But when he comes face-to-face with his past self, the newly mutated Ben Grimm is in no mood to talk. What follows is one of the most surreal moments in Marvel History as the Thing battles the Thing.