Since the Vision’s artificial mind was created using a copy of Wonder Man’s brain patterns as a template, Wonder Man’s return from the dead has left Vision feeling uneasy about his own humanity or lack of same, wondering if he is merely a mechanical copy of a real person. Already aggravated by Wonder Man’s presence because of this, Vision flies into a jealous rage when he senses Wonder Man’s attraction to his wife, the Scarlet Witch. Vision attacks Wonder Man, sparking an extended battle between the two heroes until Iron Man breaks it up. Meanwhile, in Canada, scientist Franklin Hall has gained gravity-controlling powers and uses them to turn his Research City workplace into his own floating private kingdom, where his former colleagues are forced to do his bidding. Adopting a costumed identity as Graviton, Hall plots world conquest and tries to romance his terrified co-worker Judy Parks despite her marriage to their colleague Joe Parks, who has sent the Avengers a distress call. When the Avengers arrive, Judy deliberately fails to warn Graviton, but her ambitious rival Raquel alerts him in time for Graviton to defeat all eight heroes with ease while Raquel subdues Judy.
Research City scientist Frank Hall accidentally gains gravity-controlling powers while trying to make a teleporting device work when he doubles its power, causing a power surge which produces a beam that scrambles his molecules with the energized atoms of a nearby experimental radioactive anti-gravity element. As his powers grow, he uses them to torment fellow scientists who criticize his work, and eventually decides to take over the city (p).
This issue is sometimes mistakenly cited as the point where Wonder Man joins the Avengers since he starts actively going out on missions with the team, but dialogue in this issue explicitly specifies that he is only their guest; this informal status (remarked upon several times in later issues) will persist until Av #182, ’79.
