"The Return of Doctor Doom!"
Part 2, "Back from the Dead"
Part 3, "The End of Mr. Fantastic?"
Part 4, "No Place to Turn!"
Part 5, "The Real Doctor Doom!"
Doctor Doom, with the aid of Stan Lee and Jack Kirby, captures Reed Richards. He learned a new trick from the aliens that rescued him from space: mind transference. Before Reed knows what is happening, he is trapped in Doom's body. The rest of the team show up and lay Doom low, unaware that Reed is trapped within.
Only Alicia Masters senses the swap. Johnny tricks Doom into confirming the situation, and the swap is undone. Before they can capture Doom, a trap that he planned to spring on the rest of the team catches him, and he is bathed in a reducing ray, shrinking him to nothingness.