- Script
- Robert Greenberger (credited)
- Letters
- typeset
- Genre
- non-fiction
- Synopsis
- Describes the development of the idea of Earth 2.
Printed on inside front and back covers.
- Script
- Gardner Fox (credited)
- Pencils
- Carmine Infantino (credited)
- Inks
- Joe Giella (credited)
- Colors
- ?
- Letters
- ?
- Genre
- superhero
- Characters
- The Flash [Barry Allen]; The Flash [Jay Garrick]; Iris West; Joan Garrick; The Thinker; The Fiddler; The Shade
- Synopsis
- The Flash accidentally transports himself to the world where the Golden Age Flash lives and together they take on The Thinker, The Fiddler, and The Shade.
- Reprints
Story across 25 pages in three chapters of 10.67, 7.67, and 5.67 pages.