Marvel · April, 1961
1st appearance of Iron Man prototype; 1st appearance of Metallo (Marvel); 1st appearance of Metallo (Mike Fallon); 1st appearance of Mike Fallon (Metallo); “The Thing Called Metallo” (Iron Man prototype)
The Thing Called Metallo; Nightmare!; The Hands of Hogarr!
Artists: Jack Kirby, Don Heck, Paul Reinman