Fantastic Four #4 May 1962
The Coming of... Sub-Mariner!
Fleeing the Thing, the runaway Human Torch finds the amnesiac Sub-Mariner;
The Human Torch drops the Sub-Mariner into the sea and he regains his memory;
The Sub-Mariner sends Giganto to smash New York;
Script by Stan Lee, pencils by Jack Kirby, inks by Sol Brodsky