| Issue | #80 |
| Published | January 1961 |
| Frequency | monthly |
| Cover Price | 0.10 USD |
| Pages | 36 |
| Editing | Stan Lee |
| Notes | Distributed to newstands in August 1960. This issue includes 10 pages of paid advertisements. Some information on this issue supplied by Tom Lammers, Dr. Michael J. Vassallo, and others via the Atlas/Timely discussion group. Distribution date from Joseph Marek's Marvel Comics Group history website. |
| Characters | Gargantus (sea monster) |
| Genre | monsters |
| Pencils | Jack Kirby |
| Inks | Steve Ditko |
| Notes | New logo this issue. |
| Characters | Dan; Billy; Gargantus (sea monster, introduction) |
| Synopsis | A deep sea explorer encounters a giant reptile that follows him back to the surface. The creature explores the surface, causing panic until it faints due to its inability to breathe air and is dumped back into the sea. |
| Genre | monsters |
| Pencils | Jack Kirby |
| Inks | Steve Ditko |
| Notes | Narrated in the first person. Gargantus next appears in issue #85 (June 1961). |
| Reprinted | in Creatures on the Loose (Marvel, 1971 series) #17 (May 1972) |
| Synopsis | A man's fascination with history leads him to build a time machine and travel to the past, but when he sees the dangers of time travel he destroys the machine and blueprints. |
| Genre | science fiction |
| Letters | typeset |
| Notes | Text story with illustration. Narrated in the first person. |
| Reprinted | from Mystic (Marvel, 1951 series) #57 (March 1957) |
| Characters | Lynwood; Koaa |
| Synopsis | A scientist successfully creates a link to the dimension Electra only to find the inhabitants bent on conquest. They pour through the portal but are stopped when the carved presidents on Mt. Rushmore come to life and drive them back. |
| Genre | science fiction |
| Pencils | Don Heck |
| Inks | Don Heck |
| Notes | Narrated in the first person. |
| Reprinted | in Fantasy Masterpieces (Marvel, 1966 series) #5 (October 1966); in Creatures on the Loose (Marvel, 1971 series) #17 (May 1972) |
| Characters | Bruno Zuknik |
| Synopsis | A prison warden treats inmates with kindness, and relies on an honor system to prevent them from opening the one closed door. A new prisoner defies the code and opens the door, but is taken to the warden's alien world to do hard labor. |
| Genre | science fiction |
| Pencils | Paul Reinman |
| Inks | Paul Reinman |
| Characters | Sanford Kindwell; Kroger |
| Synopsis | A millionaire looks for magical wishing stones with which he hopes to help all humanity. His greedy guide tries to steal the first stone, but only succeeds in using up its power and trapping himself. |
| Genre | occult |
| Pencils | Steve Ditko |
| Inks | Steve Ditko |
| Reprinted | in Monsters on the Prowl (Marvel, 1971 series) #22 (April 1973) |