These are the issues people look back on fondly when they talk about Lee and Kirby’s great Thor books. They start with Gods Walking the Earth stuff as Odin joins the trenchcoat disguise club. In his absence, Loki steals his throne.
To protect himself, Loki awakens Surtur to guard the Rainbow Bridge against Odin’s return. Heimdall sends Balder to warn Thor, Odin mindwipes all Earthlings, and the Gods go to battle on Earth.
And all is saved in the end.