- Script
- Edmond Hamilton
- Pencils
- John Forte
- Inks
- Sheldon Moldoff; Al Plastino (Superboy face on splash only)
- Colors
- ?
- Letters
- Milton Snapinn
- Genre
- superhero
- Characters
- 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]; Time Trapper [also as Commissioner Wilson]
- Synopsis
- The Legionnaires submit to tests of their ability to keep secret their greatest weapon from Commissioner Wilson.
- Reprints
Bouncing Boy loses his power and joins the Legion Reserves.