- Script
- Otto Binder
- Pencils
- Curt Swan
- Inks
- Ray Burnley
- Colors
- ?
- Letters
- ?
- Genre
- superhero
- Characters
- Superboy [Clark Kent]; Hercules; Samson; Krypto; Martha Kent; Jonathan Kent; King Zarl (villain)
- Synopsis
- Samson and Hercules travel to Superboy's time in order to discover the secret of his invulnerability. When Superboy explains to them that his powers cannot be replicated, the pair take him back to the past to confront the avaricious King Zarl.
- Reprints
Superboy whistles to Krypto across the time barrier.
- Script
- ?
- Pencils
- ?
- Inks
- ?
- Colors
- ?
- Letters
- typeset
Letters from Harold Kirkham, Ronald Wyatt, Bob Oechsner, Michael J. Corless, Martin Polinsky, Dennis Hensley, and Philip Taylor.
- Script
- Robert Bernstein
- Pencils
- Ramona Fradon
- Inks
- Ramona Fradon
- Colors
- ?
- Letters
- ?
- Genre
- superhero
- Characters
- Aquaman; Hadley; Topo
- Synopsis
- A criminal has a doctor alter his body to duplicate Aquaman's powers.
- Reprints
Writer credit from Martin O'Hearn at http://martinohearn.blogspot.com/ .