This issue has variants.
Distributed to newstands in April 1962. This issue includes 10 pages of paid advertisements.
Distribution date from Joseph Marek's Marvel Comics Group history website.
Job number from Tom Lammers and Ger Apeldoorn via the Atlas/Timely discussion group.
This story is a retelling of "The Man With the Atomic Brain" drawn by Steve Ditko, from Journey Into Mystery (Marvel, 1952 series) #52 (May 1959).
This story is often erroneously referred to as the first Marvel mutant story, the idea is used in earlier stories from their SF anthologies, for example "The Mutants and Me!" in Tales of Suspense (Marvel, 1959 series) #6 (November 1959) but also "Concentrate in Chaos" in Yellow Claw (Marvel, 1956 series) #2.
Tad Carter next appears in X-Men: the Hidden Years (Marvel, 1999 series) #15 (January 2001).
Includes a letter from "Carl the Cat" in Greenwich Village.