The Fantastic Four continue their explorations into the impossible - when they confront none other than the Impossible Man! From a tale that rampages through the Marvel Bullpen and features the return of the Frightful Four, Impy will both torment and team-up in an attempt to make our heroes a Fantastic Five! Then, Reed Richards is replaced by his evil Counter-Earth counterpart. It's a saga so epic in scope that Thundra, Tigra, the Mad Thinker and Annihilus are pulled into it...as Reed battles for his life in the heart of the Negative Zone! COLLECTING: Fantastic Four (1961) 176-191