- Script
- Doug Moench (credited)
- Pencils
- Tom Mandrake (credited)
- Inks
- Tom Mandrake (credited)
- Colors
- Adrienne Roy (credited)
- Letters
- John Costanza (credited)
- Job Number
- G-2077
- Genre
- superhero
- Characters
- Batman; Robin [Jason Todd]; Alfred Pennyworth; Julia Remarque; Harvey Bullock; Mirror Master [Sam Scudder] (villain); Captain Boomerang [Digger Harkness] (villain)
- Synopsis
- After trying to steal the same jade necklace, Captain Boomerang and Mirror Master face off to decide who is the greater villain.
- Reprints
Story continues in Detective Comics #555.
- Script
- Robert Greenberger
- Letters
- typeset
- Job Number
- L-2071
Letters of comment from Jeffrey Lowndes, Charles D. Brown, Craig Paeth, Joe Sarnicola, Carl Cafarelli, C.E. Dinkins and Mark Waldman.