Detective Comics  (1937)

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Cover art by Dick Sprang featuring the Joker

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Cover art by Bob Kane featuring the Joker

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1st appearance of Frankenstein in a DC comic

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1st appearance of Human Target, Fred Venable

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Cover art by Win Mortimer featuring the Catwoman

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Final appearance of Catwoman in the Golden Age

Due to the strict guidelines of the newly established Comics Code Authority, Selina Kyle and Bruce Wayne's relationship was deemed inappropriate, resulting in Catwoman's absence from comics for 12 years

In 1966, Catwoman was reintroduced in Superman's Girl Friend Lois Lane #70 (1966)

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1st appearance and origin of Martian Manhunter

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2nd appearance and origin of Martian Manhunter

Batman reveals that he operated under the Robin moniker when he was a boy

1st appearance of Harvey Harris, an early mentor of Bruce Wayne

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1st appearance, cover and origin of Batwoman, Kathy Kane

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Iconic story 'The Rainbow Batman'

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