Synopsis: Flashing forward three centuries into Earth’s future we see a bustling civilization of peaceful inhabitants – no weapons and no strife. There is one exception – Zarrko, a scientist intent on holding dominion over his weak contemporaries. He invented a time machine in order to travel back and collect weapons to use on his conquest of future Earth.
In present day, Thor is assisting the U.S. government test new weapons. Thor was about to allow a cobalt bomb to be detonated directly next to him in order for the military scientists to learn more about how it affects humans. As the countdown ticks off, Zarrko appears in his time machine, snatches the cobalt bomb in vanishes before anyone can stop him. Zarrko leaves a piece of futuristic metal behind that tips the military leaders off that he was from the future. It is Thor who gives him the name Tomorrow Man.
Thor appeals to Odin asking for permission to travel to the future to track Tomorrow Man. His wish is granted as Odin reminds Thor that his hammer has the ability to travel faster than the speed of light thus allowing time travel. Thor places the metal to his hammer to assist in identifying the correct era which turns out to be the year 2262.
The people Thor meets in the future are afraid of Zarrko and have submitted to his demands. Thor arrived about a month after Zarrko returned. Thor and a mysterious hooded stranger evade the guards at Zarrko’s castle and gain entry. Zarrko traps Thor only to find out he was a decoy – the real Thor being the man in the dark hood. Zarrko sicks his robot guards on Thor who manage to take away his hammer. Thor has 60 seconds before reverting to Dr. Don Blake.
He fills the chamber with water from a pipe short circuiting the robots, regaining his hammer. He gives chase as Zarkko takes the C-bomb to the sky planning on detonating it over the planet. Thor uses his power over weather to stop him and secures the bomb. Zarkko somehow got amnesia and doesn’t know who he is. Thor travels back to 1962 where Jane coos over Thor’s writeup in the newspaper to Dr. Don Blake.