- Script:
- John Broome
- Pencils:
- Gil Kane
- Inks:
- Bernard Sachs
- Colors:
- ?
- Letters:
- ?
- Genre:
- science fiction
- Reprints: show reprint note before migration
Pencils and inks credits confirmed from Julius Schwartz's editorial records, provided by DC Comics (29 August 2007)
- Script:
- Gardner Fox
- Pencils:
- Sid Greene
- Inks:
- Joe Giella
- Colors:
- ?
- Letters:
- ?
- Reprints: show reprint note before migration
Pencils and inks credits confirmed from Julius Schwartz's editorial records, provided by DC Comics (29 August 2007)
- Script:
- Edmond Hamilton
- Pencils:
- Carmine Infantino
- Inks:
- Carmine Infantino
- Colors:
- ?
- Letters:
- ?
- Genre:
- science fiction
- Synopsis:
- Mark Barrett agrees to undergo an experimental treatment that will allow him to use 100% of his brain, but he develops four conflicting personalities which he cannot control.
- Reprints: show reprint note before migration
Pencils and inks credits confirmed from Julius Schwartz's editorial records, provided by DC Comics (29 August 2007)
- Script:
- Joe Samachson
- Pencils:
- Sid Greene
- Inks:
- Joe Giella
- Colors:
- ?
- Letters:
- ?
- Genre:
- science fiction
- Reprints: show reprint note before migration
Pencils and inks credits confirmed from Julius Schwartz's editorial records, provided by DC Comics (29 August 2007)