Doctor Doom & Sub-Mariner against Tiger Shark, Doctor Dorcas, and Attuma. Flashback cameo appearances by the Fantastic Four, Daredevil, Quicksilver, Spider-Man, Thor, and the Hulk.
This issue features Bill Everett's last published artwork on the Sub-Mariner.
Script by Tony Isabella. Pencils by George Tuska and Bill Everett (chapter 1) and George Evans (chapter 2). Inks by Fred Kida (chapter 1) and Frank Springer (chapter 2). Cover by Ron Wilson and Frank Giacoia.