A lame doctor vacationing in Norway runs across an alien invasion. While hiding from the aliens in a cave he finds an old cane that transforms him into the god Thor. Thor drives back the alien invasion.; Dr. Blake joins a medical mission to a South American country wracked with civil war. The leader of the communist faction — the Executioner — orders an attack on the doctors, and Blake must use the power of Thor to save his colleagues and defeat the communists.; Loki escapes from his prison in Asgard and comes to Earth to get revenge on Thor. The trickster hypnotizes him to help make mischief, but Thor’s transformation into Donald Blake frees him from hypnosis, allowing him to defeat Loki and return him to Asgard.; Zarrko of the year 2262 goes back in time and steals a cobalt bomb in 1962, but Thor chases him forward in time and defeats him.; Loki discovers Thor’s secret identity and separates him from his hammer, forcing him to remain a human. Loki torments humanity, but Dr. Blake tricks him into allowing him to regain the hammer and become Thor, defeating Loki and returning him to Asgard.; A gangster, wounded in an escape, has his men kidnap Dr. Blake to operate on his gunshot wound. Blake transforms himself into Thor and brings the gang to justice and rescues Jane as well.; The heir to the throne of a race of shape-shifting aliens leads an attack on Earth as his rite of passage. The aliens replace officials in New York and disrupt the government, but Thor discovers their plan and defeats them.; Loki gives a greedy carnival mystic magical powers in order to use him to attack Thor. Thor is overcome in their first battle, but with the help of Odin and his belt of strength he defeats Loki's pawn.; Loki magically diverts Thor's hammer to free himself from his chains. Thor returns to Asgard to find the hammer, and Loki tries to kill him with magical traps, but Thor overcomes them all to find his hammer and catch Loki.; While on a medical mission to India, Dr. Blake becomes Thor to repel a Chinese attack. In order to fight Thor, a Chinese scientist irradiates himself to gain great power. He fights Thor in New York, and nearly defeats him, but Thor blows him back to China, creating a nuclear explosion.; Loki uses his magic to cause Thor's hammer to hit his head, turning him evil. Thor frees Loki, and the two terrorize Earth until the other Asgardians arrange for another blow to the head to reverse the change.; An evil scientist forces Dr. Blake to help him with a duplicating machine by kidnapping Jane. The device duplicates Thor, but cannot duplicate his magic hammer, allowing Thor to defeat the duplicate. Dr. Zaxton accidentally duplicates himself and falls to his death, leaving his good duplicate to take his place.; Merlin is awakened after a thousand years and immediately decides to try and take over the world. He battles Thor using familiar Washington D.C. monuments. Thor defeats Merlin and forces him to return to sleep.; Thor battles the Lava Man, a monster brought to the surface by Loki, who claims all the dry surface of Earth for his people. Odin forbids Thor to love Jane Foster, leading to her leaving her job as Dr. Blake's nurse.; While visiting India, Don Blake finds that one of his old teachers has been murdered by a villain who gained the power of a snake. Thor fights the Cobra in New York and defeats him, after Jane Foster sees her new boss's cowardice and goes back to Docotr Blake.; Having been refused a job by Doctor Blake, Calvin Zabo becomes Mister Hyde and attacks the doctor. Meanwhile, Odin has agreed to let Thor marry Jane Foster if she proves worthy. After Mister Hyde learns that Blake survived ('saved' by Thor) it seems that Thor robs a bank, and the police issue a warrant for his arrest.; Mister Hyde kidnaps Don Blake and Jane Foster and then tries to steal a submarine using Jane as a hostage. Jane stops Thor from catching Hyde because she thinks that Don is still in danger. The police realize that Hyde framed Thor for the bank robbery, but Jane's actions convince Odin that she is unworthy of immortality.; In order to solve the mystery of a rash of defecting American scientists, Dr. Blake uses himself as bait and is abducted by communists. He is imprisoned with the other missing scientists, but is able to transform into Thor and free them all.; Story about how Odin and his brothers protected the Earth while waiting for the coming of man.; The ice giants, led by Ymir, attack Asgard but Odin defends it and traps Ymir inside a ring of fire.