- Edmond Hamilton
- John Forte
- Sheldon Moldoff; Al Plastino (Superboy face on splash only)
- Milton Snapinn
- Legion of Super-Heroes [Sun Boy; Mon-El; Superboy; Shrinking Violet; Star Boy; Phantom Girl; Saturn Girl; Bouncing Boy; Element Lad; Ultra Boy; Chameleon Boy; Triplicate Girl; Brainiac 5; Matter-Eater Lad; Colossal Boy; Invisible Kid; Element Lad; Lightning Lad]; Time Trapper [also as Commissioner Wilson]
- The Legionnaires submit to tests of their ability to keep secret their greatest weapon from Commissioner Wilson. But Lightning Lad purposely fails his test to expose Commissioner Wilson as the Time Trapper.
Story is told in 2 parts:
Part I: The Code of the Legion! (8 pages)
Part II: The Weakest Legionnaire (9 pages)
Bouncing Boy loses his power and joins the Legion Reserves.