- Script:
- Robert Bernstein
- Pencils:
- George Papp
- Inks:
- George Papp
- Colors:
- ?
- Letters:
- Joe Letterese
- Genre:
- superhero
- Characters:
- Superboy [also appears as Clark Kent]; Sun Boy (impostor); Tom Tanner; Legion of Super-Heroes [Cosmic Boy; Lightning Lad; Saturn Girl; Phantom Girl; Brainiac 5; Chameleon Boy; Sun Boy]; Lana Lang; Martha Kent; Chief Parker
- Synopsis:
- Superboy meets new Legion member Sun Boy (who is later revealed to be an impostor). Meanwhile, reform school escapee Tom Tanner (a double for Clark Kent) tries to take over Clark's life in Smallville.
- Reprints:
Original story is partially rewritten from "The Two Clark Kents" in Adventure Comics #191 (August 1953).