Tales of Asgard: Death Comes to Thor
First appearance of Sif
Slave of Zarrko, the Tomorrow Man
Thor, his powers halved by an angry Odin, has agreed to travel to the 23rd century with the criminal scientist Arthur Zarrko in order to prevent him from destroying 20th century Earth. The Thunder God has pledged to obey Zarrko until he has conquered his century.
Arriving in the future. the Tomorrow Man has Thor create havoc until the police of that time arrive to stop him. Thor uses his hammer to enthrall the officers, and orders them to take himself and Zarrko to the ruling World Council. Zarrko orders them to give him directions to the Master Machine which runs the planet. When they refuse, Zarrko has Thor begin searching for the Master Machine. Thor manages to leave a note behind for the Council.
The Council activates a protector Octi-Robot, but Thor is able to destroy it. A Councilman then gives them the location.
Flying to a lonely isle, Thor and Zarrko enter the Master Machine's chamber and are attacked by a C-Bomb. Short for "Cell-Bomb" because it creates a prison to hold intruders. But Thor is able to overcome the increased gravity with the cell and destroy it. Zarrko takes possession of the Master Machine, making him the ruler of 23th century Earth.
Having fulfilled his vow, Thor now turns on Zarrko, and they battle. Zarrko grabs the control of the Master Machine and threatens to destroy the Earth if Thor does not halt. But before he can throw any switches, the Master machine captures Zarrko in a ball of semi-energy, ending his threat.
An official scout ship arrives moments later and arrests Zarrko. Thor's note had asked the Council to let him handle Zarrko, and based on Thor's reputation they had decided to trust him.
Twirling his hammer, Thor creates a time warp and returns to the 20th century, while Loki and Odin watch from Asgard, and Loki muses that sooner or later he will defeat Thor forever.