The Return Of Zarrko, The Tomorrow Man! An angry Thor stomps through the city, unintentionally damaging everything around him. He is upset by Odin's decision not to let him wed the mortal Jane Foster. Some ants see the rampage and relate the information to Dr. Henry Pym. Switching to Giant-Man, he alerts Iron Man of the danger. Then Pym, as Giant-Man, with his partner the Wasp, set out to stop Thor. Iron Man joins them. But it quickly becomes apparent that they will not be able to stop Thor. So rather than fight him, they pull back.
From Asgard, Odin and Loki watch the Thunder God, and Odin decides Thor must be punished for his tempter. He reduces Thor's strength in half.
Meanwhile Thor crosses the Rainbow Bridge, seeking an audience with his father Odin. Heimdall, the guardian of the bridge, drives Thor back. He realizes then that his powers have been reduced, and turned back towards earth.
Loki watches, and gloats that this may finally be time he can defeat Thor. Using the Well of Centuries, Loki looks ahead in time to the 23rd century and finds the villain Zarrko, and restores his memory. Taking an indestructible Mining Robot, Zarrko returns to the 20th century. The Tomorrow Man orders the Robot to begin a rampage designed to attract Thor.
Dr. Blake hears about the Robot on the news, and transforms into Thor. He battles the Robot, but because of his reduced powers is unable to defeat it. Zarrko threatens to destroy Earth unless Thor agrees to become his slave in the 23rd century. To save Earth, Thor agrees.
From Asgard, Odin is thunderstruck as he watches Thor's surrender. Loki silently gloats that he has defeated his brother, as they watch the Tomorrow Man fade back into the future, taking Thor with him.
