Number 1 edit
January 1956
Cover art by Ed Valigursky
- The Scarlet Saint [Part 1 of 4] • Manly Banister • novel
- Alias Jane Doe • Theodore Mathieson • short story
- Hole in the Air • Robert Silverberg • short story (© Copyright Renewed: details pending.)
- The Thirty Thousand Stiffs • Ivar Jorgensen • novelette
- The Burning Man [Johnny Mayhem] • C. H. Thames • novelette
Number 2 edit
February 1956
Cover art by Ed Valigursky
- Call Him Colossus • Malcolm Meade • novelette
- This Way Out • Ivar Jorgensen • short story
- Better Change Your Mind • C. H. Thames • novelette
- Passing Fancy • Harry L. Sonneborn • vignette
- The Scarlet Saint [Part 2 of 4] • Manly Banister • novel
Number 3 edit
March 1956
Cover art by Ed Valigursky
- The Iron Virgin • C. H. Thames • novelette
- The Vacation • Karl Stanley • short story
- The Scarlet Saint [Part 3 of 4] • Manly Banister • novel
- Green Warning • E. K. Jarvis • short story
Number 4 edit
April 1956
Cover art by Ed Valigursky 30th Anniversary Issue.
- Wanted: 7 Fearless Engineers! • Warner Van Lorne • novella
- John Jones's Dollar • Harry Stephen Keeler • short story
- Wacky World • Edmond Hamilton • short story (© Copyright Renewed: details pending.)
- Solander's Radio Tomb • Ellis Parker Butler • short story
- The Day Time Stopped Moving • Bradner Buckner • short story
- The World Beyond • Ray Cummings • novelette
- Hard Guy • H. B. Carleton • vignette
- The Rat Racket • David H. Keller • short story
- The Jameson Satellite [Professor Jameson] • Neil R. Jones • novelette
- The Strange Flight of Richard Clayton • Robert Bloch • short story
- What Man Can Imagine… • Sam Moskowitz • article (© Copyright Renewed: details pending.)
- The Sword and the Atopen • Taylor H. Greenfield • short story
- Robot AL 76 Goes Astray [Robots] • Isaac Asimov • short story
- Advanced Chemistry • Jack G. Huekels • short story
- The Eternal Wall • Raymond Z. Gallun • short story
- As I See Tomorrow… The Third Millenium Opens • Robert Heinlein • article (© Copyright Renewed: details pending.)
Number 5 edit
May 1956
Cover art by Ed Valigursky
- The Girl Who Hated Air • Milton Lesser • novelette
- Uncle Kim • Edmond Warren • short story
- The Scarlet Saint [Part 4 of 4] • Manly Banister • novel
- Killer Cat • Karl Stanley • short story
- Of Men and Bugs • Duane C. Morton • short story
- A Trip to Anywhen • Ivar Jorgensen • novelette
Number 6 edit
June 1956
Cover art by Ed Valigursky
- The Thing from Underneath • Milton Lesser • novella
- Waste Not • Henry Still • short story
- Magellan Was a Piker [Johnny Mayhem] • C. H. Thames • novelette
- Entrance Exam • Robert Silverberg • short story (© Copyright Renewed: details pending.)
- Gambler's Planet • Gordon Aghill • novelette
Number 7 edit
July 1956
Cover art by Ed Valigursky
- This Planet Is Mine [Johnny Mayhem] • C. H. Thames • novelette
- The Monument • Henry Slesar • short story (© Copyright Renewed: details pending.)
- The Last Chord • Karl Stanley • short story
- Run of Luck • Robert Silverberg • short story (© Copyright Renewed: details pending.)
- Stay Out of My Grave • Robert Silverberg • short story (© Copyright Renewed: details pending.)
- Catch a Thief • Gordon Aghill • novelette
Number 8 edit
August 1956
Cover art by Ed Valigursky
- The Beast with 7 Tails • Robert Silverberg & Randall Garrett • novella
- Vault of the Ages • Robert Silverberg • short story (© Copyright Renewed: details pending.)
- Look Homeward, Spaceman • Robert Silverberg • short story (© Copyright Renewed: details pending.)
- Calling Captain Flint • Richard Greer • short story
- Corn-Fed Genius • E. K. Jarvis • short story
- Death of a Dinosaur • Sam Moskowitz • short story (© Copyright Renewed: details pending.)
Number 9 edit
September 1956
Cover art by Ed Valigursky
- A World Called Crimson • Darius John Granger • novelette
- But Who Wilts the Lettuce? • Harlan Ellison • novelette (© Copyright Renewed: details pending.)
- The Man Who Hated Mars • Randall Garrett • short story
- Vital Ingredient • Gerald Vance • short story
- The Hunted Heroes • Robert Silverberg • short story
- Lease to Doomsday • Lee Archer • short story
Number 10 edit
October 1956
Cover art by Ed Valigursky
- The Judas Valley • Randall Garrett & Robert Silverberg • novelette
- Heist Job on Thizar • Randall Garrett • short story
- Sitting Duck • Sam Moskowitz • vignette (© Copyright Renewed: details pending.)
- A Place in the Sun [Johnny Mayhem] • C. H. Thames • novelette
- Gnomebody • Harlan Ellison • short story (© Copyright Renewed: details pending.)
- Summer Snow Storm • Adam Chase • short story
- My Shipmate—Columbus • Stephen Wilder • novelette
Number 11 edit
November 1956
Cover art by Ed Valigursky
- The Monster Died at Dawn • Henry Slesar • novelette (© Copyright Renewed: details pending.)
- Puzzle in Yellow • Randall Garrett • short story
- Concerto for a Pink Elephant • B. B. Livingston • short story
- Service Elevator • Sam Merwin • novelette
- The Idiot • Paul Dallas • vignette
- The Rivals • Robert Silverberg • short story
- Sleep It Off • Henry Slesar • short story (© Copyright Renewed: details pending.)
- The Nursery Commandos • Adam Chase • short story
Number 12 edit
December 1956
Cover art by Ed Valigursky
- The Galaxy Master • Malcolm Meade • novelette
- Repeat Broadcast • Henry Slesar • short story (© Copyright Renewed: details pending.)
- Marriages Are Made in Detroit • Henry Slesar • short story (© Copyright Renewed: details pending.)
- Death to the Earthman • Randall Garrett • novelette
- A World of His Own • Robert Silverberg • short story (© Copyright Renewed: details pending.)
- The Great Kladnar Race • Randall Garrett & Robert Silverberg • short story
- Tracking Level • Harlan Ellison • short story (© Copyright Renewed: details pending.)