On-sale date from copyright registration.
in Batman Annual (DC, 1961 series) #3 (Summer 1962)
in Superman (Egmont Ehapa, 1966 series) #24/1967 (2. Dezember 1967)
in DC Special Blue Ribbon Digest (DC, 1980 series) #15 (November 1981)
in DC Comics Classics Library: The Batman Annuals (DC, 2009 series) #1 ([June] 2009)
in Batman: The TV Stories (DC, 2013 series) (2013 [March 2014])1966 Batman TV Series, episodes 69 ("The Contaminated Cowl") and 70 ("The Mad Hatter Runs Fowl"), were based on this story.
1st appearance of the second Mad Hatter. The first Mad Hatter appeared in Batman (DC, 1940 series) #49 (October-November 1948). This Mad Hatter is later revealed as an impostor.
puzzle
| Script: | ? |
| Pencils: | Ruben Moreira (signed) |
| Inks: | Ruben Moreira (signed) |
| Colors: | ? |
| Letters: | ? |
Writer identification by Bob Hughes.
Manhunter uses super hearing for the first time.