"When Titans Clash!" Part 3 of 3. Guest-starring the Silver Surfer and Sub-Mariner. Aunt May (yes, that Aunt May) cameo. Story, art, and cover by John Byrne. While the Human Torch and Thing fight for their lives against the earthmoving power of Tyros the Terrible, the Invisible Girl confronts the orchestrator of this attack - Doctor Doom! Can even the wielder of the Power Cosmic the Silver Surfer help his friends in this, their time of need? Plus, what mystery has the mighty Sub-Mariner uncovered in the Arctic Ocean?