Fantastic Four (1961) 94-A

"The Return of the Frightful Four"

The Frightful Four come back together and set their sights on the FF, who have selected a caretaker for Reed's and Sue's son, Franklin Benjamin Richards. But everything goes wrong for the Frightful Four as Medusa turns on them and the new caretaker uses her witchcraft to create an illusion that stops the Wizard and the Sandman.

First appearance of Agatha Harkness.