The newly formed Fantastic Four barely withstood their first encounters with each of their powerful enemies, Doctor Doom and the Sub-Mariner. So what happens when Doom and Namor join forces? Find out as the armored tyrant tracks down the Sub-Mariner in his underseas kingdom, inciting him to seek vengeance on the surface world - and its accursed protectors, the Fantastic Four! But when it comes down to battle, just whose side will Namor be on? It's one of the all-time great Marvel comic books, boldly re-presented in its original form, ads and all! Reprinting FANTASTIC FOUR (1961) #6. Marvel is reprinting the first twelve issues of FANTASTIC FOUR as they originally appeared!