This is the first Thor story published by Marvel. Story is divided into three parts: Part One—Untitled (5 pp), Part Two—"The Power of Thor!" (5 pp) and Part Three—"Thor the Mighty Strikes Back!"(3 pp).
The story is expanded and retold in Thor: First Thunder (Marvel, 2010 series) #1.
Kirby previously drew Easter Island-like stone-head aliens in DC's House of Mystery #85, April 1959, as "The Stone Sentinels of Giant Island!"
Text story with illustration. The first page of this story is printed between the pages of the Thor story, while the second page is printed between the two back-up stories.
Possible Lee plot and Lieber script per Nick Caputo. The Mighty Thor Comics Index #5 by George Olshevsky only credits Stan Lee.
This story is a retelling of "I Am...Gorilla!" drawn by Paul Reinman in Strange Worlds (Marvel, 1958 series) #5 (August 1959).
Script and Letters credit is from The Mighty Thor Comics Index #5 by George Olshevsky.