- Script
- E. Nelson Bridwell (credited)
- Pencils
- Ramona Fradon (credited)
- Inks
- Bob Smith (credited)
- Colors
- Adrienne Roy (credited)
- Letters
- Ben Oda (credited)
- Job Number
- S-3178
- Genre
- superhero
- Characters
- Superman; Aquaman; Wonder Woman; Batman; Robin; Wonder Twins [Zan [John Fleming]; Jayna [Joanna Fleming]]; Gleek; Mirror Master [Sam Scudder]; The Flash [Barry Allen]; mirror-world evil Flash (villain)
- Synopsis
- Mirror Master traps the Super Friends in a mirror world so that he can capture the Wonder Twins to try to steal their powers.
- Reprints
This story introduces the Wonder Twins secret identities of John and Joanna Fleming.
- Script
- E. Nelson Bridwell
- Pencils
- ?
- Inks
- ?
- Colors
- ?
- Letters
- typeset
- Job Number
- S-3165
Letters from Al Schroeder III, Chris Khalaf, Seth Spivak, and Steven Piziks.