- Edmond Hamilton
- John Forte
- Sheldon Moldoff; Al Plastino (head photostated/pasted on Superboy, page 3, panel 1)
- Milton Snapinn (part 1); Joe Letterese (splash of part 2); Vivian Berg?
- Mort Weisinger
- Legion of Super-Pets [Super-Horse [Comet]; Krypto; Streaky; Super-Monkey [Beppo]; Proty II]; Legion of Super-Heroes [Superboy; Phantom Girl; Sun Boy; Lightning Lad; Brainiac 5; Light Lass; Saturn Girl; Mon-El; Chameleon Boy; Ultra Boy]; Legion of Substitute-Heroes [Fire Lad; Chlorophyll Kid; Polar Boy; Night Girl]; Supergirl
- With the Legion away trying to capture the Time Trapper, the Super-Pets are left in charge. They assign Proty II tests to prove he can join their ranks. But Proty II passes his final tests and is admitted into the Legion of Super-Pets.
Story is told in 2 parts:
Part I: The Super-Tests of the Super-Pets! (8 pages)
Part II: The Pet of a Thousand Faces! (9 pages)
Superboy head by Al Plastino spotted by Bob Bailey. Previously Plastino was said to have done splash pages. (Per Sandell ed.)