- Script
- ?
- Pencils
- Howard Purcell
- Inks
- Howard Purcell
- Letters
- ?
- Editing
- Jack Schiff (original editor); Murray Boltinoff (original associate editor); George Kashdan (original associate editor)
- Genre
- science fiction
- Characters
- Zarn from the planet Cetu; Tog from the planet Cetu
- Reprints
- Keywords
- aliens
DC logos and “My Greatest Adventure” banner removed from pp. 1-7, and “The Best Comics are Still 10c” banner removed from p. 8 (no banner on p. 9). p. 8: word “center” changed to “centre”. Last page of original story artwork extended and altered to make it into 9.0 pages instead of 8.67.
- Script
- ?
- Pencils
- Bernard Baily
- Inks
- Bernard Baily
- Letters
- Stan Starkman
- Editing
- Jack Schiff (original editor); Murray Boltinoff (original associate editor); George Kashdan (original associate editor)
- Genre
- science fiction
- Synopsis
- A scientist conducting an experiment to see through time accidentally releases monsters from the future.
- Reprints
- Keywords
- crickets; evolution; monsters; time travel
DC logos and “My Greatest Adventure” banner removed from pp. 1-7, and “The Best Comics are Still 10c” banner removed from p. 8.
- Script
- ?
- Pencils
- Ruben Moreira
- Inks
- Ruben Moreira
- Letters
- ?
- Editing
- Jack Schiff (original editor); Murray Boltinoff (original associate editor); George Kashdan (original associate editor)
- Genre
- science fiction
- Characters
- Gleer (alien); Stu; Brad; Willy
- Synopsis
- A giant alien criminal threatens the Earth but three vacationing Americans figure out how to stop him.
- Reprints
- Keywords
- aliens
DC logos and “House of Secrets” banner removed from each page of story (none on p. 1). p. 2: words “three Americans speed” changed to “three tourists speed”. p. 5: words “outer space punk” changed to “outer space crook”.
- Script
- ?
- Pencils
- Ralph Mayo
- Inks
- Ralph Mayo
- Letters
- ?
- Editing
- Whitney Ellsworth (credited original editor)
- Genre
- horror-suspense
- Characters
- Conrad Crane; J.B. Dales
- Reprints
DC logos and “House of Mystery” banner removed from every page of story. p. 4: words “the north woods” changed to “the south west”. Last page of original story artwork cropped and altered to make it into 5.5 pages instead of 5.67.
- Script
- Harry Lampert
- Pencils
- Harry Lampert
- Inks
- Harry Lampert
- Letters
- Harry Lampert
- Editing
- Whitney Ellsworth (original editor)
- First Line of Dialogue or Text
- ...And you pay a pound an hour?
- Genre
- humour
- Reprints
Story artwork cropped and altered to make it fit under last page of “Dead Man's Diary”. Words “a dollar and hour” changed to “a pound an hour”, and “Mom” changed to “Mum”.
- Script
- ?
- Pencils
- Joe Kubert; Mort Meskin
- Inks
- George Roussos
- Letters
- ?
- Editing
- Jack Schiff (original editor); Murray Boltinoff (original associate editor); George Kashdan (original associate editor)
- Genre
- science fiction
- Characters
- George Townley; Skranth (Alien)
- Reprints
- Keywords
- aliens; Eiffel Tower; Leaning Tower of Pisa; The Sphinx
DC logos and “House of Mystery” banner removed from every page of story.
- Script
- Jack Miller
- Pencils
- Bill Ely
- Inks
- Bill Ely
- Letters
- Pat Gordon
- Editing
- Whitney Ellsworth (credited) (editor); Jack Schiff (actual)
- Genre
- crime; detective-mystery
- Characters
- Agent Drew; The Human Eel; Zorac; Captain Georges; police of many nations
- Synopsis
- Agent Drew is obsessed with stopping The Human Eel's empire of crime. The Eel wears a special "shock suit" that jolts his enemies into submission. Even Drew suffered a shock, and now has a weak heart, so can't function at heights. He pursues the Eel atop the Eiffel Tower, the Pyramid of Egypt, but gasps for air so the Eel escapes. Finally, in Johannesburg, he disguises as Zorac, the Eel's criminal competitor. Donning an oxygen mask, he mounts a high bridge to confront the Eel and smashes the controls of his "shock suit".
- Reprints
- Keywords
- Argentina; Egypt; Eiffel Tower; France; Johannesburg; pyramid; South Africa
DC logos and “Showcase” banner removed from every page of story. p. 4: words “police precinct” changed to “police station”.
- Script
- ?
- Pencils
- Bill Ely
- Inks
- Bill Ely
- Letters
- ?
- Editing
- Jack Schiff (original editor); Murray Boltinoff (original associate editor); George Kashdan (original associate editor)
- Genre
- science fiction
- Characters
- Steve Waters; Proffessor Madison
- Synopsis
- A lab accident causes Professor Madison's mind to be transferred into a destructive robot and his assistant must save him.
- Reprints
- Keywords
- aliens; Morse code; robots
DC logos and “House of Secrets” banner removed from each page of story (none on last page). Last page of original story artwork extended and altered to make it into 8.0 pages instead of 7.67.
- Script
- Gardner Fox
- Pencils
- Sid Greene
- Inks
- Sid Greene
- Letters
- ?
- Editing
- Julius Schwartz (original editor)
- Genre
- science fiction
- Characters
- Dave Wilson; Joe Wilson; Bess Wilson; Mirak of Kalannor; Krull of Pthan
- Reprints
- Keywords
- aliens
DC logos and “Strange Adventures” banner removed from every page of story. p. 2: words “a Maine hilltop” changed to “a country hilltop”.
- Script
- ?
- Pencils
- Jay McArdle
- Inks
- Jay McArdle
- Letters
- ?
- Editing
- Whitney Ellsworth (credited original editor)
- Genre
- science fiction
- Characters
- Joey Frankenstein; ‘Big Boy’ Claymore
- Reprints
DC logos and “House of Mystery” banner removed from every page of story. p. 1: words “If my name had been Washington” changed to “If my name had been Churchill”.
- Script
- ?
- Pencils
- Howard Purcell
- Inks
- Howard Purcell
- Letters
- ?
- Editing
- Jack Schiff (credited original editor); Murray Boltinoff (credited associate editor); George Kashdan (credited associate editor)
- Genre
- science fiction
- Characters
- Ward Forrest; Jezzre; D’lor; Syrol; Tyrod
- Reprints
DC logos and “Tales of the Unexpected” banner removed from each page of story (none on p. 1). The Year 2089. p. 3: word “maneuvering” changed to “manoeuvring”. Last page of original story artwork extended and altered to make it into 8.0 pages instead of 7.67.
- Script
- ?
- Pencils
- Jim Mooney
- Inks
- Jim Mooney
- Letters
- Pat Gordon
- Editing
- Whitney Ellsworth (credited original editor)
- First Line of Dialogue or Text
- What strange and awesome power had been able to superimpose human beings upon the faces of the giant playing cards?
- Characters
- The Great Thornley; Harry Harness; Harvey Brink; Jan Howell; Mayor Bill Jones
- Reprints
- Keywords
- magic; playing cards
DC logos and “House of Secrets” banner removed from each page of story (none on p. 1). p. 2: “$5,000” changed to “£5,000”.
- Script
- Otto Binder
- Pencils
- Sid Greene
- Inks
- Joe Giella
- Letters
- ?
- Editing
- Whitney Ellsworth (credited original editor); Julius Schwartz (actual original editor)
- Genre
- science fiction
- Characters
- Rax-Jun; Professor Lloyd Ashton
- Reprints
- Keywords
- aliens; North America Nebula; United Nations
DC logos and “Mystery in Space” banner removed from each page of story (none on p. 1). p. 8: words “who would be the first Earthmen to travel into space” changed to “who would be the first Earthmen to reach another galaxy”. The Year 1961.
- Script
- ?
- Pencils
- John Giunta
- Inks
- John Giunta
- Letters
- ?
- Editing
- Jack Schiff (credited original editor); Murray Boltinoff (original associate editor); George Kashdan (original associate editor)
- Genre
- science fiction
- Characters
- Klars of Sarnos; Elg of Sarnos; Dan Robb
- Reprints
- Keywords
- aliens
DC logos and “Tales of the Unexpected” banner removed from each page of story (none on last page). Last page of original story artwork extended and altered to make it into 8.0 pages instead of 7.67. The Year 2284.
- Script
- Jerry Coleman
- Pencils
- Lee Elias
- Inks
- Lee Elias
- Letters
- Stan Starkman
- Editing
- Jack Schiff (original editor); Murray Boltinoff (original associate editor); George Kashdan (original associate editor)
- Genre
- science fiction
- Characters
- Gkangki of Planet 5; xxx Knowles
- Synopsis
- When a man saves the life of an alien, the alien uses his super-science to help the man but causes lots of problems.
- Reprints
- Keywords
- aliens
DC logos and “My Greatest Adventure” banner removed from each page of story (none on first and last page). Last page of original story artwork extended and altered to make it into 8.0 pages instead of 7.67. p. 2: words “Blast it!” changed to “Darn it!”.