Fantastic Four (1961-1998) #4 (Fantastic Four (1961-1996))

The Coming of the Sub-Mariner!
Out on his own, Johnny encounters and helps restore the memory of a fallen hero, the Namor the Sub-Mariner! When Namor returns to his undersea kingdom and finds it decimated, he assumes the surface world is the cause and unleashes a powerful monster onto New York City and the Fantastic Four.